The FitzHerbert Family

Herbert FitzHerbert

Father: Herbert

see Red Book of the Exchequer part 1 p205 (ed. Hubert Hall, 1896) for direct statement that this father Herbert was the son of another Herbert, the Chamberlain

see  Rotuli Chartarum in Turri Londinensi Asservati. Volume 1, part 1. [1199-1216] p215 for confirmation of a grant by Herbert son of Herbert and William his brother. I think this Herbert, brother of William, was Herbert the Chamberlain, and grandfather of this Herbert (HERB11xx). William was treasurer of York in the grant and later Archbishop of York and saint.

Mother: Sibyl Corbet (a mistress of Henry I), daughter of Robert Corbet and co-heiress of Alcester

Married: Lucy de Hereford

Lucy of Hereford, daughter of Miles of Gloucester, 1st Earl of Hereford and Sibyl de Neufmarché.
Lucy, Lady of Blaen Llyfni and Bwlch y Dinas, da. and eventually coh. of Miles, Earl of Hereford. (The Complete Peerage vol 5 p465n (George Edward Cokayne, 1926))

Lucia de Hereford is explicitly named as the mother of Peter, son of Herbert in
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p296 (1833)
1217.
   REX Ric̅o filio Reg̃ sat̃t̃. Mandam̄9 vob̄ qđ sine dilōne plenā saisinā hr̃e faciatis dilc̃o nob̃ in Xp̅o Ab̃bi de Abbendoñ de man̅io de Lechamsteď c̅ om̄ib̃9 ptiñ suis quod de feodo suo est quod quidẽ Lucia de Hereford̄ mat̅ Pet̅i filii Herb̄ti que ī fata 9cessit de feodo ip̅ius Ab̃bis tenuit. Et qm̃ sigillū nōd̄ū tc̃a. T. eod̄ Com̅ apud Oxoñ, xviij̅o. die Jañ.
This transcribes into regular Latin type as:
1217.
  Rex Ricardo filio Regis salutem. Mandamus vobis quod sine dilatione plenam saisinam habere faciatis dilecto nobis in Christo Abbati de Abbendon de manerio de Lechamsted cum omnibus pertinentiis suis quod de feodo suo est quod quidem Lucia de Hereford mater Petri filii Herberti quae in fata concessit de feodo ipsius Abbatis tenuit. Et quoniam sigillum nondum etcetera. Teste eodem Comite apud Oxoniam, xviij°. die Januarii.

which translates into English as:
1217.
  The king to Richard, son of the king, greeting. We command you that without delay you cause our beloved in Christ, the abbot of Abingdon, to have full seisin [possession] of the manor of Leckhampstead with all its appurtenances, which is of his fee, which same manor Lucy of Hereford, mother of Peter son of Herbert, who has departed into the fates [passed away], held of the fee of the same abbot. And since [our] seal [is] not yet [made] etc. Witnessed by the same earl at Oxford, the 18th day of January.

Children: Occupation: Chamberlain; Sheriff of Gloucestershire (1196 - 1199) and sheriff of Shropshire

Notes:
Herbert is recorded in 1161-2, paying scutage of 1 mark in Wiltshire.
Red Book of the Exchequer part 1 p32 (ed. Hubert Hall, 1896)
A.D. 1161-2. … WILTESIRA. … Herbertus filius Herberti, jm.
This roughly translates as:
A.D. 1161-2. … Wiltshire … Herbert son of Herbert, 1m.


This entry in the Red Book of the Exchequer documents Herbert as the son of Herbert who was, in turn, the son of Herbert the Chamberlain. The entry concerns two knights fees held in Southamptonshire.
Red Book of the Exchequer part 1 p205 (ed. Hubert Hall, 1896)
A.D. 1166. … SUTHAMTESCIRA.
… Herbertus filius Herberti Camerarii senioris tenuit feoda ij militum, et modo tenet Herbertus filius ejus.
This roughly translates as:
A.D. 1166. … Southamptonshire
… Herbert, son of Herbert the Chamberlain the elder, held two knights' fees, and his son Herbert now holds them.


In 1177 Herbert and two others were offered the kingdom of Limerick by king Henry II for 60 knights fees, but he declined this offer due to the danger of subduing the territory was which still held fiercely by the Gaelic Irish led by Domnall Mór Ua Briain.
Chronica magistri Rogeri de Houedene vol 2 pp134-136 (ed. William Stubbs, 1869)
A.D. 1177. May
  
Deditque dominus rex Hugoni de Lasci, ut supradictum est, in Hybernia totam Midam cum pertinentiis suis pro servitio c. militum, tenendam de ipso et Johanne filio suo, et cartam suam ei inde fecit. Deditque ibidem Roberto filio Stephani et Miloni de Cogham regnum de Corch, pro servitio lx. militum, tenendum de ipso et Johanne filio suo, excepta civitate de Corch cum uno cantredo, quem dominus rex sibi et hæredibus suis retinuit. Deditque ibidem Hereberto filio Hereberti, et Willelmo fratri comitis Reginaldi,2 et Joslano de la Pumerai nepoti eorum, regnum de Limeric, pro servitio lx. militum, tenendum de ipso et Johanne filio suo; excepta civitate de Limeric cum uno cantredo, quem dominus rex sibi et hæredibus suis retinuit.
… Deinde3 venit dominus rex usque Merleberge, ubi rex dedit Philippo de Breusa totum regnum de Limeric pro servitio sexaginta militum, tenendum de ipso et de Johanne filio suo. Nam Herbertus et Willelmus fratres Reginaldi comitis Cornubiæ, et Joslanus de la Pumerai nepos eorum, regnum illud habere noluerunt, eo quod nondum perquisitum erat. Nam occiso a regalibus rege Monoculo,4 qui rex erat de Limeric et homo regis Angliæ inde fuerat, quidam de progenie illius, vir potens et fortis, regnum de Limeric invasit, cepit, et potenter rexit, nullam subjectionem faciens regi Angliæ; nec suis obedire voluit propter infidelitatem eorum, et mala quæ faciebant populo Hyberniæ sine merito. Rex vero Corcensis et alii multi divites Hyberniæ insurrexerunt in regem Angliæ et suos: et erant novissima eorum pejora prioribus, et se mutuo interfecerunt.
  2 Earl of Cornwall, son of Henry I.
  3 Deinde] after June 3. Bened.  i. 172.
  4 Tigernach o Rourk, king of Meath.
This roughly translates as:
A.D. 1177. May
  And the lord king gave to Hugh de Lacy, as was said above, all Meath in Ireland with its appurtenances for the service of 100 knights, to be held from himself and John his son, and he made his charter to him thereof. And he gave there to Robert fitz Stephen and Miles de Cogan the kingdom of Cork, for the service of 60 knights, to be held from himself and John his son, except the city of Cork with one cantred, which the lord king retained for himself and his heirs. And he gave there to Herbert fitz Herbert, and William, brother of earl Reginald2, and Goscelin de la Pomerai their nephew, the kingdom of Limerick, for the service of 60 knights, to be held from himself and John his son; except the city of Limerick with one cantred [unit of land equivalent to a hundred], which the lord king retained for himself and his heirs.
…  Then3 the lord king came to Marlborough, where the king gave to Philip de Braose the whole kingdom of Limerick for the service of sixty knights, to be held from himself and from John his son. For Herbert and William, brothers of Reginald, earl of Cornwall, and Goscelin de la Pomerai their nephew, were unwilling to have that kingdom, because it was not yet conquered. For after king Monoculo4 [the One-Eyed], who was king of Limerick and had been the king of England's man for it, was slain by the king's men, a certain man of his lineage, a powerful and strong man, invaded, seized, and powerfully ruled the kingdom of Limerick, rendering no subjection to the king of England; nor was he willing to obey his [the king's] men because of their faithlessness and the undeserved evils they were inflicting upon the people of Ireland. Indeed, the king of Cork and many other rich men of Ireland rose up against the king of England and his men: and their last state was worse than the first, and they slaughtered one another.
  2 Earl of Cornwall, son of Henry I.
  3 Then] after June 3. Bened.  i. 172.
  4 Tigernach o Rourk, king of Meath.

Herbert is recorded in 1190-1 paying scutage of 20 shillings for two knight's fees in Berkshire.
Red Book of the Exchequer part 1 p73 (ed. Hubert Hall, 1896)
A.D. 1190-1. … BERKESIRE. … Herbertus filius Herberti, xxs. in ij milites.
This roughly translates as:
A.D. 1190-1. … Berkshire … Herbert son of Herbert, 20s. 2 knight's fees.


The marriage settlement of Herbert's son, Peter, dated 20 November 1203, documents Herbert's father and provides information about some of his land holdings.
Curia Regis Rolls 5-7 JOHN pp6-7 (1926)
1203.
  Euerwikesir’.— Sciant presentes et futuri quod ita convenit inter Herebertum filium Hereberti et Petrum filium ejus de maritagio Alicie filie Roberti filii Rogeri, quam idem Petrus duxit in uxorem, quod predictus Herebertus dedit et concessit Petro filio suo ad dotandum Aliciam predictam uxorem suam totum tenementum suum de Euerwikesir’, de quo eum saisivit coram domino H. Cantuariensi episcopo G. filio Petri justiciario domini regis Willelmo de Cantilupo Reginaldo de Cornhull’ Ricardo de Seinghes et multis aliis: idem autem Petrus predictam Aliciam uxorem suam inde dotavit de assensu patris sui. Idem eciam Petrus concessit patri suo totum tenementum predictum tam de se quam de Alicia uxore sua tenendum ad firmam tota vita ipsius Hereberti pro centum marcis annuis in duobus terminis anni solvendis, scilicet quinquaginta marcis ad Pascha et quinquaginta marcis ad festum sancti Micaelis, ita quod, si predictus Herebertus firmam illam prefato Petro aut predicte Alicie uxori sue in terminis statutis non reddiderit, ipse Petrus et Alicia uxor sua totum tenementum illud in manum suam recipient sine aliqua reclamatione predicti Hereberti: et si Petrus aut Alicia uxor sua huic conventioni non steterit, predictus Herebertus quietus erit de predicta firma illis reddenda: si autem predictum Petrum ante patrem suum mori contingit, ipse Herebertus predicte Alicie uxori predicti Petri firmam illam in vita sua integre persolvet, ita quod, si predictus Herebertus firmam illam eidem Alicie ad terminos statutos non reddiderit, ipsa Alicia totum tenementum illud in manum suam recipiet sine aliqua reclamatione ipsius Hereberti: et si ipsa Alicia huic conventioni in aliqua contradixerit, predictus Herebertus quietus erit de predicta firma illi reddenda: et eadem Alicia post mortem pre[dicti] Hereberti, si ipsa supervixerit, totum tenementum illud tanquam dotem suam recuperabit. De ista conventione hinc inde firmiter tenenda plegii sunt predictus dominus Cantuariensis archiepiscopus et G. filius Petri justiciarius. Et si predictus Herebertus a conventione illa aliquatenus vellet resilire, predictus dominus archiepiscopus de [assen]su ipsius Hereberti eum distringet per justiciam ecclesiasticam secundum conventionem … et cartam inter eos factam … dictus itaque Herebertus cartam suam faciet prefato Petro filio suo secundum scriptum illud: Petrus etiam Hereberto [patri] suo secundum idem scriptum cartam suam faciet: dictus quoque Herebertus uxori ejusdem Petri, et eadem uxor predicto Hereberto, cartam suam inde faciet. Hec conventio recordata fuit apud Westmonasterium et concessa xx. die Novembris anno quinto regni regis Johannis coram Ricardo de Herierd Simone de Pateshill’ Godefrido de Insula Johanne de Gestinghes Oseberto filio Herveii Eustacio de Faukenberge Waltero de Crepinghes justiciariis et aliis fidelibus domini regis ibidem tunc presentibus.
This roughly translates as:
1203.
  Yorkshire.— Let those present and future know that it has been thus agreed between Herbert, son of Herbert, and Peter, his son, concerning the marriage of Alice, daughter of Robert, son of Roger, whom the same Peter has taken as his wife: that the aforesaid Herbert has given and granted to Peter, his son, for the dower of the aforesaid Alice, his wife, his entire tenement [estate/holding] of Yorkshire, of which he seized [legally put him in possession of] him in the presence of the Lord H[ubert], archbishop of Canterbury, G[eoffrey] fitz Peter, justiciar of the lord king, William de Cantilupe, Reginald de Cornhill, Richard de Seinghes, and many others; and the same Peter has endowed his aforesaid wife Alice therewith, with the assent of his father. The same Peter has also granted to his father the entire aforesaid tenement, both on behalf of himself and of Alice his wife, to be held at farm [leased] for the entire life of the same Herbert for one hundred marks annually, to be paid at two terms of the year: namely, fifty marks at Easter and fifty marks at the Feast of Saint Michael [Michaelmas]. So that if the aforesaid Herbert does not pay that farm to the late Peter or to the aforesaid Alice his wife at the appointed terms, Peter himself and Alice his wife shall receive that entire tenement into their own hand without any objection from the aforesaid Herbert. And if Peter or Alice his wife does not abide by this agreement, the aforesaid Herbert shall be quit [released] from paying the aforesaid farm to them. If, however, it happens that the aforesaid Peter dies before his father, Herbert himself shall pay that farm in its entirety to the aforesaid Alice, wife of the aforesaid Peter, during her life; so that if the aforesaid Herbert does not pay that farm to the same Alice at the appointed terms, Alice herself shall receive that entire tenement into her own hand without any objection from the same Herbert. And if Alice herself acts contrary to this agreement in any way, the aforesaid Herbert shall be quit from paying the aforesaid farm to her. And the same Alice, after the death of the aforesaid Herbert, if she survives him, shall recover that entire tenement as her dower. For the firm holding of this agreement on both sides, the pledges are the aforesaid lord archbishop of Canterbury and G[eoffrey] fitz Peter, justiciar. And if the aforesaid Herbert should wish to withdraw from that agreement in any respect, the aforesaid lord archbishop, with the assent of Herbert himself, shall distrain him through ecclesiastical justice according to the agreement… and the charter made between them… and so the said Herbert shall make his charter to the preferred Peter, his son, according to that writing; Peter also shall make his charter to Herbert, his father, according to the same writing; and the said Herbert shall make his charter thereof to the wife of the same Peter, and the same wife to the aforesaid Herbert. This agreement was recorded at Westminster and granted on the 20th day of November in the fifth year of the reign of king John [20 November, 1203], before Richard de Herriard, Simon de Pattishall, Godfrey de l'Isle, John de Gestinghes, Osbert fitz Hervey, Eustace de Fauconberg, Walter de Crepping, justices, and other faithful subjects of the lord king then present there.

A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland vol 4 p465 (John Burke, 1838)
  HERBERT FITZ-HERBERT, who obtained from HENRY II. a confirmation of the landed possessions of his father, and likewise the office of chamberlain. In the 12th of that monarch, anno 1166, upon the assessment of the aid which was then levied for marrying the king’s daughter, he certified that he held one knight’s fee in Wilts and three in Berks. Upon the Conquest of Ireland HENRY II. at a great council held at Oxford anno 1177 gave the kingdom of Limeric in that Realme to this Herbert and William his brother, Reginald, Earl of Cornwall and Josceline de la Pomerai their nephew (the City of Limeric and one cantred excepted, which the king reserved to himself and his heirs) to be held by the service of sixty knight’s fees, but it appears they declined the gift. In the 6th of RICHARD I. he was sheriff of the county of Gloucester, for one of that year and afterwards during the whole reign of that king. In the eighth of the same reign he was likewise sheriff of Shropshire. He m. Lucie, third dau. and co-heir of Milo Fitzwalter, Earl of Hereford, and by her acquired the Forest of Dene, where he afterwards resided in the Castle of St. Michael, with other large possessions in the counties of Brecknock and Gloucester. He had issue,
  Reginald Fitz-Herbert, d. s. p. vita pa
tris.
  PETER FITZ-HERBERT, his heir.
  Matthew Fitz-Herbert, sheriff of Sussex, in 1233, and being named one of the barons to King JOHN, signed Magna Charter in 1215. …
  Herbert d. in 1205, and was s. by his elder surviving son,

The Complete Peerage vol 5 p465n (George Edward Cokayne, 1926)
  (d) … Piers (who d. kal. Julii—seemingly a mistake for kal. Junii—was bur. at Reading—Annales de Theokesberia, p. 97) was 2nd but 1st surv. s. and h. of Herbert fitz Herbert (who d. before 18 July 1204), by Lucy, Lady of Blaen Llyfni and Bwlch y Dinas, da. and eventually coh. of Miles, Earl of Hereford.

Death: 1204

Herbert is known to have been alive on 20 November 1203 when he agreed a marriage settlement for his son, Piers (Curia Regis Rolls 5-7 JOHN pp6-7 (1926)) but had died by 18 July 1204, when his land at Alcester had been inherited by Piers.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p3 (1833)
  REX tcc̃. G. fit̃ Pet̄. Mandam̄9 vob̄ qd̄ pvideatis de aliqa eschaeta n̄ra Hamōi Falconario q̃ ei reman̄e possit ī escābiū ad valentiā t̄re sue de Alencestr̄ q̄a reddim̄9 Pet̄o fit̄ Hereb̄ti. t̄ eā illi h̄re faciatis. T. W. Com̄ Sar̄r̄ ap̄d Bristolt̄ xviij. die Jul̄i. p̄ Huḡ de Nevill̄. 
This transcribes into regular Latin type as:
  REX etc. G. filio Petri salutem. Mandamus vobis quod provideatis de aliqua eschaeta nostra Hamoni Falconario quae ei remanere possit in escambium ad valentiam terrae suae de Alencestr’ quam reddidimus Petro filio Hereberti; et eam illi habere faciatis. Teste W. Comite Sarisberiae apud Bristol’ xviij. die Julii. Per Hugonem de Nevill’
which translates into English as:
  The king etc. to G[eoffrey] fitz Peter, greeting. We command you that you provide for Hamo the falconer from some escheat of ours, which may remain to him in exchange to the value of his land of Alcester, which we have restored to Peter son of Herbert; and cause him to have it. Witnessed by W[illiam Longespée], earl of Salisbury, at Bristol, the 18th day of July. By Hugh de Neville.

Sources:

Peter FitzHerbert

Father: Herbert FitzHerbert

Mother: Lucy de Hereford

Married (1st): Alice, daughter of Robert FitzRoger, in 1203

Alice, the daughter of Robert fitzRoger, Lord of Warkworth and Clavering and Margaret de Chesney,

The marriage settlement was dated 20 November 1203.
Curia Regis Rolls 5-7 JOHN pp6-7 (1926)
1203.
  Euerwikesir’.— Sciant presentes et futuri quod ita convenit inter Herebertum filium Hereberti et Petrum filium ejus de maritagio Alicie filie Roberti filii Rogeri, quam idem Petrus duxit in uxorem, quod predictus Herebertus dedit et concessit Petro filio suo ad dotandum Aliciam predictam uxorem suam totum tenementum suum de Euerwikesir’, de quo eum saisivit coram domino H. Cantuariensi episcopo G. filio Petri justiciario domini regis Willelmo de Cantilupo Reginaldo de Cornhull’ Ricardo de Seinghes et multis aliis: idem autem Petrus predictam Aliciam uxorem suam inde dotavit de assensu patris sui. Idem eciam Petrus concessit patri suo totum tenementum predictum tam de se quam de Alicia uxore sua tenendum ad firmam tota vita ipsius Hereberti pro centum marcis annuis in duobus terminis anni solvendis, scilicet quinquaginta marcis ad Pascha et quinquaginta marcis ad festum sancti Micaelis, ita quod, si predictus Herebertus firmam illam prefato Petro aut predicte Alicie uxori sue in terminis statutis non reddiderit, ipse Petrus et Alicia uxor sua totum tenementum illud in manum suam recipient sine aliqua reclamatione predicti Hereberti: et si Petrus aut Alicia uxor sua huic conventioni non steterit, predictus Herebertus quietus erit de predicta firma illis reddenda: si autem predictum Petrum ante patrem suum mori contingit, ipse Herebertus predicte Alicie uxori predicti Petri firmam illam in vita sua integre persolvet, ita quod, si predictus Herebertus firmam illam eidem Alicie ad terminos statutos non reddiderit, ipsa Alicia totum tenementum illud in manum suam recipiet sine aliqua reclamatione ipsius Hereberti: et si ipsa Alicia huic conventioni in aliqua contradixerit, predictus Herebertus quietus erit de predicta firma illi reddenda: et eadem Alicia post mortem pre[dicti] Hereberti, si ipsa supervixerit, totum tenementum illud tanquam dotem suam recuperabit. De ista conventione hinc inde firmiter tenenda plegii sunt predictus dominus Cantuariensis archiepiscopus et G. filius Petri justiciarius. Et si predictus Herebertus a conventione illa aliquatenus vellet resilire, predictus dominus archiepiscopus de [assen]su ipsius Hereberti eum distringet per justiciam ecclesiasticam secundum conventionem … et cartam inter eos factam … dictus itaque Herebertus cartam suam faciet prefato Petro filio suo secundum scriptum illud: Petrus etiam Hereberto [patri] suo secundum idem scriptum cartam suam faciet: dictus quoque Herebertus uxori ejusdem Petri, et eadem uxor predicto Hereberto, cartam suam inde faciet. Hec conventio recordata fuit apud Westmonasterium et concessa xx. die Novembris anno quinto regni regis Johannis coram Ricardo de Herierd Simone de Pateshill’ Godefrido de Insula Johanne de Gestinghes Oseberto filio Herveii Eustacio de Faukenberge Waltero de Crepinghes justiciariis et aliis fidelibus domini regis ibidem tunc presentibus.
This roughly translates as:
1203.
  Yorkshire.— Let those present and future know that it has been thus agreed between Herbert, son of Herbert, and Peter, his son, concerning the marriage of Alice, daughter of Robert, son of Roger, whom the same Peter has taken as his wife: that the aforesaid Herbert has given and granted to Peter, his son, for the dower of the aforesaid Alice, his wife, his entire tenement [estate/holding] of Yorkshire, of which he seized [legally put him in possession of] him in the presence of the Lord H[ubert], archbishop of Canterbury, G[eoffrey] fitz Peter, justiciar of the lord king, William de Cantilupe, Reginald de Cornhill, Richard de Seinghes, and many others; and the same Peter has endowed his aforesaid wife Alice therewith, with the assent of his father. The same Peter has also granted to his father the entire aforesaid tenement, both on behalf of himself and of Alice his wife, to be held at farm [leased] for the entire life of the same Herbert for one hundred marks annually, to be paid at two terms of the year: namely, fifty marks at Easter and fifty marks at the Feast of Saint Michael [Michaelmas]. So that if the aforesaid Herbert does not pay that farm to the late Peter or to the aforesaid Alice his wife at the appointed terms, Peter himself and Alice his wife shall receive that entire tenement into their own hand without any objection from the aforesaid Herbert. And if Peter or Alice his wife does not abide by this agreement, the aforesaid Herbert shall be quit [released] from paying the aforesaid farm to them. If, however, it happens that the aforesaid Peter dies before his father, Herbert himself shall pay that farm in its entirety to the aforesaid Alice, wife of the aforesaid Peter, during her life; so that if the aforesaid Herbert does not pay that farm to the same Alice at the appointed terms, Alice herself shall receive that entire tenement into her own hand without any objection from the same Herbert. And if Alice herself acts contrary to this agreement in any way, the aforesaid Herbert shall be quit from paying the aforesaid farm to her. And the same Alice, after the death of the aforesaid Herbert, if she survives him, shall recover that entire tenement as her dower. For the firm holding of this agreement on both sides, the pledges are the aforesaid lord archbishop of Canterbury and G[eoffrey] fitz Peter, justiciar. And if the aforesaid Herbert should wish to withdraw from that agreement in any respect, the aforesaid lord archbishop, with the assent of Herbert himself, shall distrain him through ecclesiastical justice according to the agreement… and the charter made between them… and so the said Herbert shall make his charter to the preferred Peter, his son, according to that writing; Peter also shall make his charter to Herbert, his father, according to the same writing; and the said Herbert shall make his charter thereof to the wife of the same Peter, and the same wife to the aforesaid Herbert. This agreement was recorded at Westminster and granted on the 20th day of November in the fifth year of the reign of king John [20 November, 1203], before Richard de Herriard, Simon de Pattishall, Godfrey de l'Isle, John de Gestinghes, Osbert fitz Hervey, Eustace de Fauconberg, Walter de Crepping, justices, and other faithful subjects of the lord king then present there.

Alice was da. of Robert fitz Roger, of Warkworth ( Pipe Roll, 5 Joh., m. 5; Close Roll, 19 Hen. III, m. 11 ) (The Complete Peerage vol 5 p465n (George Edward Cokayne, 1926)). See Medieval Lands (PIERS FitzHerbert) "ALICE, daughter of ROBERT FitzRoger of Warkworth & his wife Margery de Chesney. "

Children: Married (2nd): Isabel (de Ferrers) de Mortimer

Isabel was the daughter of Walkelin de Ferrers. She married, firstly, Roger Mortimer of Wigmore, with whom she had five children - Hugh, Ralph, Robert, Philip and Joan. Roger died in 1214. Isabel outlived Peter by many years, dying shortly before April 29, 1252, when her manor at Lechlade was ordered to be taken into the king's hands. She lived her final years as a nun and patroness of the St. John the Baptist Hospital at Lechlade, Gloucestershire, where she was buried.

Isabel is named as the wife of Peter and brother of Henry de Ferrers in an entry in the Fine Rolls in 1225.
Henry III Fine Rolls Project: C 60/22, 9 HENRY III (28 October 1224–14 June 1225)
1225.
12 April. Westminster. …
154 Order to the barons of the Exchequer to place in respite the demand for 15 m. that they make from Peter fitz Herbert and Isabella, his wife, for the debt of Henry de Ferrers, brother of the same Isabella, until the octaves of Trinity in the ninth year.

After her husband's death Isabella obtained he support of the king in a dispute with her stepson, Herbert, over lands that she had inherited in her own right.
Calendar of the Close Rolls Henry III 1234-1237 pp101-102 (1908)
1235.
  Pro Isabella que fuit uxor Petri filii Herberti.—Mandatum est Herberto filio Petri quod, in fide qua regi tenetur et sicut noluerit quod rex erga ipsum moveatur, Isabelle que fuit uxor Petri filii Herberti, patris sui, sine dilatione rationabilem dotem suam assignari faciat de omnibus terris et tenementis que fuerunt predicti Petri et sunt in manu ipsius Herberti, et, antequam rationabilem dotem ei assignaverit, nullum tallagium vel auxilium assideri faciat vel redditum capi in predictis terris, sciturus pro certo quod, nisi dotem suam ei sine dilatione assignaverit de terris predictis, rex eam ei faciet assignari. Teste ut supra [rege apud Rading’, xj. die Junii.].
…
  Pro Isabella que fuit uxor Petri filii Herberti.—Rex cepit fidelitatem Isabelle que fuit uxor Petri filii Herberti, de omnibus terris et tenementis que ipsam Isabellam hereditarie contingunt et quas predictus Petrus et ipsa Isabella uxor ejus de rege tenuerunt in capite de hereditate ipsius Isabelle. Et mandatum est vicecomiti Glouc’ quod de manerio de Lecheland’ cum pertinentiis, quod ipsam Isabellam hereditarie contingit et quod ipsi Petrus et Isabella prius tenuerunt, sicut predictum est, eidem Isabelle sine dilatione plenam seisinam habere faciat et ipsam in seisina sua manuteneas et defendas. Teste ut supra.
  Eodem modo mandatum est vicecomiti Rotel’ de manerio de Ocham cum pertinentiis. Teste ut supra.
This roughly translates as:
   On behalf of Isabella, who was the wife of Peter son of Herbert.—Command is given to Herbert son of Peter, by the faith in which he is bound to the King and as he would wish that the King not be moved against him, that he cause to be assigned without delay to Isabella, who was the wife of Peter son of Herbert, his father, her reasonable dower from all the lands and tenements which belonged to the aforesaid Peter and are in the hand of the same Herbert; and, before he has assigned her reasonable dower to her, he shall cause no tallage [tax] or aid to be assessed, nor rent to be taken in the aforesaid lands; knowing for certain that, unless he assigns her dower to her without delay from the lands aforesaid, the King will cause it to be assigned to her. Witnessed as above [by the King at Reading, the 11th day of June].
…
  On behalf of Isabella, who was the wife of Peter son of Herbert.—The King has taken the fealty of Isabella, who was the wife of Peter son of Herbert, for all the lands and tenements which touch the same Isabella by right of inheritance, and which the aforesaid Peter and the same Isabella his wife held of the King in chief from the inheritance of the same Isabella. And command is given to the sheriff of Gloucestershire that he cause the same Isabella to have full seisin without delay of the manor of Lechlade with its appurtenances, which touches the same Isabella by right of inheritance and which the same Peter and Isabella previously held, as is aforesaid, and that he maintain and defend her in her seisin. Witnessed as above.
  In the same manner, command is given to the sheriff of Rutland concerning the manor of Oakham with its appurtenances. Witnessed as above.
p357
1236.
  Berk’—Isabella de Mortuo Mari attoruavit loco suo Radulfum le Deen et Johanuem de Syvetoth versus Herbertum filium Petri de placito couventionis de dote ipsius Isabelle quod summonitum est coram rege. 
This roughly translates as:
  Berkshire—Isabella de Mortimer appointed in her place Ralph le Deen and John de Syvetoth against Herbert son of Peter concerning a plea of agreement of the dower of the same Isabella, which has been summoned before the King.

Calendar of the Close Rolls Henry III 1251-1253 pp82-83 (1927)
1252.
  
De manerio de Lecchelad’ capiendo in manum regis.—Mandatum est abbati de Persore, escaetori regis, quod sine dilacione capiat in manum regis manerium de Lecchelade, quod fuit Isabelle de Mortuomari jam mortue, et quod debet esse in manum regis tamquam escaeta sua, et illud salvo custodiat donec rex aliud inde preceperit. Et mandatum est vicecomiti Glouc’ quod cum requisitus fuerit a escaetore vim resistentem in eodem manerio faciat amoveri. Teste ut supra [rege apud Westmonasterium xxix. die Aprilis]. Per R. Waler’.
This roughly translates as:
  Concerning the manor of Lechlade to be taken into the hand of the king.—Command is given to the abbot of Pershore, the King’s escheator, that without delay he take into the hand of the King the manor of Lechlade, which belonged to Isabella de Mortimer, now dead, and which ought to be in the hand of the king as his escheat, and that he keep it safely until the king shall command otherwise regarding it. And command is given to the sheriff of Gloucestershire that, when he shall be requested by the escheator, he cause any resisting force in the same manor to be removed. Witnessed as above [the king at Westminster the 29th day of April]. By R. Walerand..

Monasticon Anglicanum vol 6 part 1 p350 (William Dugdale, 1849)
  Priory of Wigmore
  Radulphus frater suus junior ex Isabella Ferrers, secunda uxore, collegii sive hospitalis de Lechelade fundatrice,c et ibi tumulata, procreatus, successit in dominium.
  c Ibid. [Fundatio Hospitalis de Lechelade.] fol. 51 b.
This roughly translates as:
   Priory of Wigmore
  Ralph, his younger brother, born of Isabel Ferrers, the second wife, founder of the college or hospital of Lechlade,c and buried there, succeeded to the lordship.
  c Ibid. [Fundatio Hospitalis de Lechelade.] fol. 51 b.

The Complete Peerage vol 4 p191n (George Edward Cokayne, 1916)
  (c) … Walkelin, who was father of (1) Henry, Seigneur de Chambrais in 1202, (2) Hugh, of Lechlade, who d. s.p. in 1204, having m. Margaret, da. and h. of Hugh de Say of Richard’s Castle, and (3) Isabel (d. before 31 May 1252), who m., 1stly, Roger de Mortemer of Wigmore (d. 24 June 1214), and 2ndly, Piers fitz Herbert of Blaen Llyfni (d. 1 June 1235). Isabel inherited Lechlade, and also Oakham, which her eldest br., Henry, had lost at the time of the conquest of Normandy.

Occupation: Baron of Berstaple in Devonshire; Governor of Pickering Castle and Sheriff of Yorkshire

Notes:
Peter FitzHerbert was a powerful 13th-century nobleman, courtier, and Marcher Lord. He was a prominent royal advisor to king John and as one of the barons named in the preamble of the Magna Carta in 1215. Through his mother, Peter inherited a lucrative one-third share of the barony of the Earl of Hereford including Blaenllynfi and Castell Dinas. He held extensive lands spanning Berkshire, Oxfordshire, Warwickshire, Wiltshire, Yorkshire, and the Welsh Marches.
  Peter was closely allied to king John. The king rewarded his loyalty by granting him the honour of Barnstaple in Devonshire and appointing him governor of Pickering Castle and sheriff of Yorkshire (1214–1215). Because he stayed loyal to the crown during the Papal Interdict (1208–1213), medieval chroniclers like Roger of Wendover branded him one of king John's "wicked councillors". Peter was chosen as one of the noble councillors listed in the opening of the Magna Carta in 1215 to advise the king. He rebelled against king John toward the end of the First Barons' War, resulting in the temporary seizure of some of his lands. However, he quickly returned to royal allegiance upon the accession of the young king Henry III in 1216, and his estates were restored. In October 1233, during the rebellion of Richard Marshal, 3rd Earl of Pembroke, Peter's Welsh strongholds of Blaenllynfi and Castell Dinas were sacked and ruined by Marshal and prince Llywelyn ab Iorwerth.

Peter is recorded in 1194-5, paying scutage of 15 shillings for three quarters of a knight's fee in Berkshire.
Red Book of the Exchequer part 1 p94 (ed. Hubert Hall, 1896)
A.D. 1194-5. … BERKESCIRA. … Petrus filius Herberti, xvs. in hoc comitatu—iij partes [militis].
This roughly translates as:
A.D. 1194-5. … Berkshire … Peter son of Herbert, 15s. in this county—three parts [of a knight's fee].


Peter inherited a moiety of the manor of Alcester, Warwickshire, from his father and, after payment of 20 marks to the king, this was restored to him in 1204.
Rotuli de Oblatis et Finibus in Turri Londinensi asservati John 1199-1216 p200 (1835)
This transcribes into regular Latin type as:
WAREWIC. — Petrus filius Herberti dat domino Regi xx. marcas pro habenda saisina medietatis manerii de Alenc’ quam pater suus tenuit.
which translates into English as:
Warwickshire.—Peter son of Herbert gives to the lord King 20 marks for having seisin of a moiety of the manor of Alcester which his father held.

Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p3 (1833)
  REX tcc̃. G. fit̃ Pet̄. Mandam̄9 vob̄ qd̄ pvideatis de aliqa eschaeta n̄ra Hamōi Falconario q̃ ei reman̄e possit ī escābiū ad valentiā t̄re sue de Alencestr̄ q̄a reddim̄9 Pet̄o fit̄ Hereb̄ti. t̄ eā illi h̄re faciatis. T. W. Com̄ Sar̄r̄ ap̄d Bristolt̄ xviij. die Jul̄i. p̄ Huḡ de Nevill̄. 
This transcribes into regular Latin type as:
  REX etc. G. filio Petri salutem. Mandamus vobis quod provideatis de aliqua eschaeta nostra Hamoni Falconario quae ei remanere possit in escambium ad valentiam terrae suae de Alencestr’ quam reddidimus Petro filio Hereberti; et eam illi habere faciatis. Teste W. Comite Sarisberiae apud Bristol’ xviij. die Julii. Per Hugonem de Nevill’
which translates into English as:
  The king etc. to G[eoffrey] fitz Peter, greeting. We command you that you provide for Hamo the falconer from some escheat of ours, which may remain to him in exchange to the value of his land of Alcester, which we have restored to Peter son of Herbert; and cause him to have it. Witnessed by W[illiam Longespée], earl of Salisbury, at Bristol, the 18th day of July. By Hugh de Neville.
p26b
1205.
  R̄EX t̃c̃. Vic̃ Warewic̃ t̃c̃. Pone ī respectū usq̃ ad Pentecosten anno regni ñri septimo demandā qΪ facis Pet̄o fit̄ H’b̄ti de xx. marc̃ qΪs nob̃ debet de fine q̃ fec̃ nob̃cū p̄ t̄ra sua de Alecestr̄. T. G. fit̄ Pet̅i ap̄d Geldeford̄ x. die Apr̅it̄. p̄ eūdē [Petrū de Stoǩ].
This transcribes into regular Latin type as:
1205.
  REX etc. vicecomiti Warewic’ etc. Pone in respectum usque ad Pentecosten anno regni nostri septimo demandam quam facis Petro filio Herberti de xx. marcis quas nobis debet de fine quem fecit nobiscum pro terra sua de Alecestr’. Teste G[alfrido] filio Petri apud Geldeford’ x. die Aprilis. Per eundem[Petrum de Stoke].

which translates into English as:
1205.
  The king etc. to the sheriff of Warwickshire greeting. Put in respite [suspend] until Pentecost in the seventh year of our reign [May 21, 1206] the demand which you make upon Peter son of Herbert for 20 marks, which he owes to us for the fine that he made with us for his land of Alcester. Witnessed by G[eoffrey] fitz Peter at Guildford, the 10th day of April. By the same [Peter de Stoke].

In 1208 Peter was involved in armed conflict with Gwenwynwyn, the Prince of Southern Powys, over territory in Wales.
Rotuli Litterarum Patentium in Turri Londinensi Asservati 1201-1216 vol 1 part 1 p86b (1835)
This transcribes into regular Latin type as:
1208.
  Rex omnibus militibus et bacheleriis et fidelibus suis salutem. Sciatis quod bene placet nobis quod eatis cum dilecto et fideli nostro P. filio Herberti ad perquirendum jus suum et hereditatem, quam Wenhunwen ei deforciat, salva fide nostra et salvis serviciis que nobis debetis et summonicionibus exercitus nostri. Et durent litere iste usque ad Natale Domini anno regni nostri xº. Teste Willelmo Briwerre apud Gillingham, xxix. die Septembris.

which translates into English as:
1208.
  The King to all his knights and bachelors and faithful subjects, greeting. Know ye that it well pleases us that you go with our beloved and faithful P[eter]. son of Herbert to recover his right and inheritance, which Gwenwynwyn deforces from him, saving our faith and saving the services which you owe to us and the summonses of our army. And these letters shall endure until the Nativity of the Lord in the 10th year of our reign [25 December 1208]. Witness William Brewer at Gillingham, 29th day of September.

In 1210-1212, Peter is recorded in possession of one knight’s fee at Manekeford in Wiltshire, and three knight’s fees in Beverley, Yorkshire, as well as three-quarters of a knight's fee in Warwickshire held jointly with Willelmus de Boterellis.
Red Book of the Exchequer part 2 p484 (ed. Hubert Hall, 1896)
A.D. 1210-12. … WILTESCIRA … Petrus filius Herberti, Manekeford.
p492
A.D. 1210-12. … EBORWICSCIRA … Beverliga … Petrus filius Hereberti, iijes milites.
p550
A.D. 1210-12. … WARWICSIRA … Petrus filius Herberti et Willelmus de Boterellis tres partes.

Peter was named by Roger of Wendover as one of king John's "wicked councillors" for assisting the king in his expropriation of church property following John's excommunication by pope Innocent III in a dispute over who was to be named archbishop of Canterbury.
Rogeri de Wendover Chronica, sive Flores historiarum vol 3 pp237-238 (Roger of Wendover, 1841)
A.D. 1211. … Habuit autem rex hac interdicti tempestate consiliarios iniquissimos, quorum nomina pro parte hic ponere non omittam; Willelmus quoque frater regis et comes Saresbiriensis, Albericus de Ver comes Oxoniensis, Gaufridus filius-Petri Angliæ justiciarius, … Petrus filius-Hereberti et Thomas Basset, et alii multi, quos longum esset enumerare, qui regi in omnibus placere cupientes consilium non pro ratione sed pro voluntate dederunt.
This roughly translates as:
  Moreover, during this storm of the interdict, the king had most wicked councillors, whose names I will not omit to set down here in part; William, the king's brother and Earl of Salisbury, Alberic de Vere, Earl of Oxford, Geoffrey son of Peter, justiciar of England, … Peter son of Herbert and Thomas Basset, and many others, whom it would be tedious to enumerate, who, desiring to please the king in all things, gave advice not according to reason but according to their will.

In 1212 Herbert was one of a number of powerful nobles who stood surety for Peter de Maulay, another of the "wicked councillors" in his reconciliation with king John.
Rotuli Chartarum in Turri Londinensi Asservati 1199-1216 vol 1 p191 (1837)
  Universis Christi fidelibus presente carta inspecturis P. Dei gratia Wintoniensis, et J. Norwicensis, episcopi, Willelmus Lunge espéé comes Sarisberiae, G. filius Petri comes Essexiae, R. comes Cestriae, W. comes Arundelli, comes Albemarliae, H. de Nevilla, magister R. de Marisco archidiaconus Northumbriae, H. archidiaconus Staffordiae, W. archidiaconus Huntendoniae, Willelmus Briwerre, Petrus filius Herberti [Petr⁹ fit Herbti], Thomas de Samford, Robertus de Burgat, Robertus de Ropele, ohannes de Bassingeburnia, Engelardus de Cigoin, Henricus filius Comitis, magister Ernaldus de Auclent, magister Robertus de Gloucestria, Johannes filius Hugonis, Philippus de Ulecot, Briennus de Insula, et Walterus de Sancto Audoeno, salutem. Sciatis quod manucepimus pro Petro de Maulay, cujus dominus Rex ad peticionem nostram officia sua reddidit, quod ipse in nulla re de cetero contradicet precepto domini Regis, nec erga nec erga ipsum scienter delinquat; et quod per custodias suas nec malum nec dampnum domino Regi vel regno suo eveniet, ita quod si ipse per infortunium suum vel culpam suam dominum Regem de cetero offendit, nos corpus ejus domino Regi liberabimus ad faciendum de eo voluntatem suam, ita quod quamcumque vindictam de eo capere voluerit, non erimus contra, nec malas gentes ei sciemus. Preterea salve erunt domino Regi prime convenciones de eodem Petro per cartas, quas habet vel habere voluit; et in hujus rei testimonium nos huic carte sigilla nostra apposuimus; et ego W. comes Arundelli, ad peticionem domini P. Wintoniensis episcopi, huic carte sigillum meum apposui pro eo et pro me ipso; et dominus Rex manucepit quod dominus Norwicensis sigillum suum apponet. Scriptum apud Meves, xxvij. die Maii, anno r. domini Regis xiijmo.
This roughly translates as:
  To all the faithful of Christ who shall inspect this present charter, P[eter des Roches], by the grace of God bishop of Winchester, and J[ohn de Gray], bishop of Norwich; William Longespée, earl of Salisbury; G[eoffrey] fitz Peter, earl of Essex; R[anulf de Blondeville], earl of Chester; W[illiam d'Aubigny], earl of Arundel; [William de Forz], earl of Aumale; H[ugh] de Neville; master R[ichard] de Marisco, archdeacon of Northumberland; H[enry], archdeacon of Stafford; W[alter], archdeacon of Huntingdon; William Briwerre; Peter son of Herbert; Thomas de Sandford; Robert de Burgate; Robert de Ropesley; John de Bassingebourn; Engelard de Cigogné; Henry, son of the earl; master Ernald of Auckland; master Robert of Gloucester; John son of Hugh; Philip de Ulcot; Brian de l'Isle; and Walter de Saint-Ouen, greeting. Know ye that we have mainperned [become personal legal guarantors] for Peter de Maulay, whose offices our lord the king, at our petition, has restored to him: [guaranteeing] that he shall in no way from henceforth contradict the command of our lord the king, nor knowingly offend against him; and that through his custody [of royal castles and lands] neither harm nor damage shall come to our lord the king or to his kingdom. So that if he, by his misfortune or his own fault, should henceforth offend the lord king, we will deliver his body up to our lord the king to do with him according to his will, so that whatever vengeance he wishes to take upon him, we will not stand against it, nor will we knowingly harbor bad people around him. Furthermore, the original covenants concerning the same Peter via charters which he has or wished to have shall remain safe to the lord king. And in testimony of this matter, we have apposed our seals to this charter; and I, W[illiam], earl of Arundel, at the petition of the lord P[eter], bishop of Winchester, have apposed my seal to this charter for him and for myself; and the lord king has mainperned that the lord [bishop] of Norwich shall appose his seal.Written at Nieuwpoort [Meves], the 27th day of May, in the 13th year of the reign of our lord the king.

Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p121 (1833)
1212.
  P̄CEPTU’ ẽ Bat̄lis Hug̃ de Nevill̄ de Frigido Mantello q̄d̄ pmittat̄ Petr̄ fit̄ Herb̄ti cape iiijor. dāmos ī Wassa de Spineto t̄ Constab̄ Porc̃ q̄d̄ pmittat eū cape iij. dāmos ī foresta de Porcestr̃. T. R̄. ap̄d Wudestoǩ vj. die Aug̃.  p̄ Hug̃ de Bernevall̄.
This transcribes into regular Latin type as:
1212.
  PRECEPTUM est ballivis Hugonis de Nevill de Frigido Mantello quod permittant Petrum filium Herberti capere iiijor. damos in Wassa de Spineto et Constabulario Porcestrie quod permittat eum capere iij. damos in foresta de Porcestrie. Teste Rege apud Wudestok vj. die Augusti.per Hugonem de Bernevall.

which translates into English as:
1212.
  It is commanded to the bailiffs of Hugh de Neville of Freemantle that they permit Peter son of Herbert to take 4 buck deer in the chase of 'Wassa de Spineto' [the thorny waste/woodland near Freemantle/Pamber], and to the constable of Portchester that he permit him to take 3 buck deer in the forest of Portchester. Witnessed by the king at Woodstock, the 6th day of August. By Hugh de Berneval.

In the spring of 1213, king John was massing a fleet along the southern coast of England to prepare for a crossing to invade France and defend against a threatened French counter-invasion. As a major regional lord with administrative ties to the ports of Hampshire, Peter was ordered to source and secure a safe military transport ship for two elite continental allies.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p129 (1833)
1213.
  MANDAT’ ẽ Pet̄o fit̄ Hereb̄ti q̄d̄ īveniat unā navē securā Ērico Buissard̄ t̄ Joudowino de Bloyo ad transfretand̄. T. . . . . . . . . . . . . . Apr̅it̄.  p̄ Dñm P. Wiñt̄. sub pvo sigillo.
This transcribes into regular Latin type as:
1213.
  MANDATUM est Petro filio Hereberti quod inveniat unam navem securam Erico Buissard et Joudowino de Bloyo ad transfretandum. Teste . . . . . . . . . . . . . Aprilis.  per Dominum P[etrum] Wintoniensem sub parvo sigillo.

which translates into English as:
1213.
  It is commanded to Peter son of Herbert that he find one safe ship for Eric Buissard and Joudowin de Blaye for crossing the sea. Witnessed [at . . .] the [. . .] day of April. By the lord P[eter des Roches], bishop of Winchester, under the privy seal.
p154
1213.
  R̄ex Petro fit̄ Herbt̄i t̃c̃. Sciatis q̄d̄ dedimus Joh̅i Brisepot Albredam fit̄ Simōis Hochedez duc̄endam in ux̃ c̅ tota t̄ra sua qΪ eam h̄editarie cōting̃ qΪ est de donac̃one ñra. Et īo vob̃ mandam̄9 q̄d̄ p̄dc̃am Albredā c̅ tota p̄dc̃a t̄ra sua eid̄ Joh̅i sñ dilōne h̄re faciatis. T. me ip̅o ap̄ Frigid̄ Mantell̄, xxvij. die Octobr̃.  p̄ W. Com̄ Sar̄r̄.
This transcribes into regular Latin type as:
1213.
  Rex Petro filio Herberti etc. Sciatis quod dedimus Johanni Brisepot Albredam filiam Simonis Hochedez ducendam in uxorem cum tota terra sua quae eam hereditarie contingit quae est de donatione nostra. Et ideo vobis mandamus quod praedictam Albredam cum tota praedicta terra sua eidem Johanni sine dilatione habere faciatis. Teste me ipso apud Frigidum Mantellum, xxvij. die Octoberis. per W[illelmum] Comitem Sarriae [Sarisberiae].

which translates into English as:
1213.
  The king to Peter son of Herbert etc. Know ye that we have given to John Brisepot Albreda, daughter of Simon Hochedez, to be taken to wife, with all her land which falls to her by inheritance, which is of our donation. And therefore we command you that you cause the same John to have the aforesaid Albreda with all her aforesaid land without delay. Witnessed by myself at Freemantle, the 27th day of October. By W[illiam Longespée], earl of Salisbury.

Rotuli Litterarum Patentium in Turri Londinensi Asservati 1201-1216 vol 1 part 1 p104 (1835)
This transcribes into regular Latin type as:
1213.
  REX A. de Ver Comiti Oxoniensi etc. Mandamus vobis quod sine dilacione liberetis Petro filio Herberti Johem filium et obsidem Johannis de Monmouth qui est in custodia vestra, quia idem Petrus manucepit per cartam suam quam penes nos habemus quod prefatum Johannem nobis reddet ad sumonicionem nostram. Et in hujus rei testimonium has litteras nostras patentes vobis etc. Apud Henleg’, xxiij. die Novembris, anno xvº.

which translates into English as:
1213.
  The King to A[ubrey] de Vere Earl of Oxford etc. We command you that without delay you deliver to Peter son of Herbert, John, the son and hostage of John de Monmouth, who is in your custody, because the same Peter has become surety by his charter, which we have in our possession, that he will render the aforesaid John to us at our summons. And in witness of this matter [we send] these our letters patent to you etc. At Henley, 23rd day of November, in the 15th year [of our reign]. 
p110
This transcribes into regular Latin type as:
1214.
  REX Petro filio Herberti etc. Sciatis quod commisimus Johanni de Wikenholt Vicecomiti Berkeseire, castrum de Walingeford’ cum omnibus pertinenciis suis custodiendum quamdiu nobis placuerit. Et ideo vobis mandamus quod eidem Johani predictum castrum de Walingeford’ cum omnibus pertinenciis suis sine dilacione liberetis. Et in hujus rei etc. Teste ut proximo supra [me ipso apud Stansted’, xxx. die Januarii, anno regni nostri xvº].

which translates into English as:
1214.
  The King to Peter son of Herbert etc. Know ye that we have committed to John de Wikenholt, Sheriff of Berkshire, the castle of Wallingford with all its appurtenances, to be kept for as long as it shall please us. And therefore we command you that to the same John you deliver the aforesaid castle of Wallingford with all its appurtenances without delay. And in [witness] of this matter etc. Witness as next above [myself at Stansted, 30th day of January, in the 15th year of our reign]. 
p113
This transcribes into regular Latin type as:
1214.
  REX Willelmo filio Radulfi etc. Sciatis quod commisimus dilecto et fideli nostro Petro filio Hereberti castrum nostrum de Pikering’ cum pertinenciis suis custodiendum quamdiu nobis placuerit. Et ideo vobis mandamus quod quando dominus Wintoniensis Episcopus vobis mandaverit: ipsum castrum predicto Petro liberetis. Et in hujus rei testimonium etc. vobis mittimus. Teste me ipso apud Xantonem, viij. die Aprilis, anno regni nostri xvº.

which translates into English as:
1214.
  The King to William son of Ralph etc. Know ye that we have committed to our beloved and faithful Peter son of Herbert our castle of Pickering with its appurtenances, to be kept for as long as it shall please us. And therefore we command you that when the lord Bishop of Winchester commands you, you deliver that castle to the aforesaid Peter. And in witness of this matter etc. we send to you. Witness myself at Saintes, 8th day of April, in the 15th year of our reign.

Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p179 (1833)
1214.
  R̄ex P. fit̄ H’b̄ti t̃c̃. Mittim̄9 ad vos Magr̅m Edmund̄ venator̄ē ñrm cum canib̃9 ñris mandantes qΪtin̄9 eū curr̄e fac̃ in foresta ñra de Puiťing̃, ad porcos, t̄ ea necc̃aia inveniatis, t̄ porcos bñ salari t̄ custodiri fac̃. T. me ip̅o ap̄ Novū Temp̄t̄ Lond̄, xxj̅o. die Noṽ.
This transcribes into regular Latin type as:
1214.
  Rex P[etro] filio Herberti etc. Mittimus ad vos Magistrum Edmundum venatorem nostrum cum canibus nostris, mandantes quatinus eum currere faciatis in foresta nostra de Pamber’ [Puit’king’], ad porcos, et ea necessaria inveniatis, et porcos bene salari et custodiri faciatis. Teste me ipso apud Novum Templum London’, xxj°. die Novembris.

which translates into English as:
1214.
  The king to P[eter] son of Herbert etc. We send to you Master Edmund our huntsman with our hounds, commanding that you cause him to run [hunt] in our forest of Pamber for wild boars, and that you find those things necessary for them, and that you cause those boars to be well salted and guarded. Witnessed by myself at the New Temple, London, the 21st day of November.
pp181-182
1214.
  R̄ex P. f H’b̄ salt̃. Mandam̄9 vob̄ q̄d̄ cū canib̃9 ñris capiatis in foresta de Piking̃. C. inf̅. porcos t̄ laysas. Ita q̄ vos ip̅i
p̄ntes sitis ad illos capiend̄. Ita tñ q̄ in tali loco capiant̄ ubi nos currẽ freqñcius 9suevim̅9. Carnẽ salsari faciatis & b̄ capita porcoꭄ in vino suliciat̄ ad op̅ n̄rm & b̄ aliud succis̃ in c̃vis̃ appat̄ custodiri faciatis. T. ut supius [R̄. ap̄ Relegȟ, viij̅o. die Noṽ].
This transcribes into regular Latin type as:
1214.
  Rex P[etro] filio H[er]b[erti] salutem. Mandamus vobis quod cum canibus nostris capiatis in foresta de Pamber’ [Piking’] C. i[n]f[ra]. porcos et laysas. Ita quod vos ipsi praesentes sitis ad illos capiendos. Ita tamen quod in tali loco capiantur ubi nos currere frequencius consuevimus. Carnem salsari faciatis et capita porcorum in vino suliciatur ad opus nostrum et aliud succisum in cervisia apparatum custodiri faciatis. Teste ut superius [
Rege apud Relegh, viij°. die Novembris].
which translates into English as:
1214.
  The king to P[eter] son of Herbert greeting. We command you that, with our hounds, you take in the forest of Pamber 100 between wild boars and sows. So that you yourself are personally present at their taking. Provided, however, that they be taken in such a place where we have been accustomed to hunt more frequently. Cause the meat to be salted, and let the heads of the boars be soused in wine for our use, and cause the other cut meat prepared in ale to be safely guarded. Witnessed as above [the king at Rayleigh, the 8th day of November].

This entry from the Close Rolls documents Peter operating as the supreme royal official in the North of England: sheriff of Yorkshire and keeper of three massive royal castles. The king issues a direct mandate to the the barons of the exchequer ordering them to credit Peter's account for the heavy operational expenses he incurred maintaining these fortresses, offsetting his balance against the revenues he collected from the county.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p187b (1833)
1215.
  R̄B̅. Bar̄ de Scac̃io t̃c̃. Computate dilc̃o & fid̄li ñro P. fit̄ Herb̄ ron̄ab̄les expens̃ suas qΪs posuit in custod̄ Comitat̅9 Eborac̃, & castroꭄ de Pontf̄acto & de Eborac̃ & de Pikering̃ a t̃mpe qΪ Comit̅ eund̄ h̄uit in custod̄ & castr̅ p̄dc̃a p̄ p̄cept̅ ñrm. Quia t̄n p̄dc̃us Petr̅9 nob̃ deb̄at respondē de pficuo Comitat̅9: rectū est qΪ ei ron̄ab̄les ex̅pnse allocent̅r quas in p̄dc̃a custod̄ posuit. T. ut supius [R̄. apud Cẏrecestr̃, x̅o. die Febr̃].
This transcribes into regular Latin type as:
1215.
  Breve Baronibus de Scaccario etc. Computate dilecto et fideli nostro P[etro] filio Herberti rationabiles expensas suas quas posuit in custodia Comitatus Eboraci, et castrorum de Pontefracto et de Eboraco et de Pikeringa a tempore quo Comitatum eundem habuit in custodia et castra praedicta per praeceptum nostrum. Quia tamen praedictus Petrus nobis debebat respondere de proficuo Comitatus; rectum est quod ei rationabiles expensae allocentur quas in praedicta custodia posuit. Teste ut superius [Rege apud Cyrecestrie, x°. die Februarii].

which translates into English as:
1215.
  Writ to the barons of the exchequer greeting. Account to our beloved and faithful P[eter] son of Herbert his reasonable expenses which he laid out in the custody [guardianship] of the county of York, and of the castles of Pontefract, of York, and of Pickering, from the time when he held the same county and the aforesaid castles in his custody by our command. Because, however, the aforesaid Peter was bound to answer to us for the profit [revenues] of the county: it is right that his reasonable expenses which he laid out in the aforesaid custody be allowed to him. Witnessed as above [the king at Cirencester, the 10th day of February].

This entry from the Close Rolls, dated April 13, 1215, shows king John scrambling to manage his aristocratic relationships just two months before the signing of Magna Carta. The king orders Peter to immediately refund £27 that Peter had previously confiscated from the northern estates of the powerful baron William de Forz, earl of Aumale, while those lands were temporarily seized into the king's hands. Because the earl of Aumale held the massive northern lordship of Holderness in Yorkshire, it was Peter, operating as the regional sheriff and custodian, who physically marched onto the earl's manors, seized his agricultural revenues, and collected this £27 on behalf of the royal treasury. In the spring of 1215, king John’s regime was on the verge of total collapse as the baronial rebellion intensified. William de Forz, earl of Aumale, was a highly volatile, heavily armed military heavyweight whose allegiance was critical. To keep Aumale from joining the rebel camp, the king suddenly reversed his previous asset seizures and ordered Peter to swiftly hand back the confiscated cash.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p194b (1833)
1215.
  Rex Petro fil̄ Herb̄ti salt̃. Mandam̄9 vob̄ qđ hr̃e fac̃ dilc̃o ⁊ fideli nr̃o W. Comiti Aubemarl̄ xxvij. łi. quas cepistis de t̃ra sua qΪmdiu illa fuit in manu nr̃a. T. ut supius. [me ip̃o ap̃ Oxoñ, xiij. die April̃].
This transcribes into regular Latin type as:
1215.
  Rex Petro filio Herberti salutem. Mandamus vobis quod habere facias dilecto et fideli nostro W[illelmo] comiti Aubemarle xxvij. libras quas cepistis de terra sua quamdiu illa fuit in manu nostra. Teste ut superius. [me ipso apud Oxoniam, xiij. die Aprilis].

which translates into English as:
1215.
  The king to Peter son of Herbert greeting. We command you that you cause our beloved and faithful W[illiam], earl of Albemarle [Aumale], to have 27 pounds which you took from his land as long as it was in our hand. Witnessed as above [by the king at Oxford, the 13th day of April, 1215].

This entry in the Close Roll explicitly titles Peter as "vicecomiti Eboraci" or sheriff of Yorkshire, commanding him to lead a high-level judicial panel alongside three prominent northern knights to oversee an assize of mort d'ancestor—a specialized royal land court proceeding tracking inherited tenant boundaries.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p203 (1833)
1215.
  Will’s fit̄ Wit̄li & Adam de Novo M’cato, Adam de Romenit̄, & Thom̃ de Horbir̃ siml̄ cum Pet̄o fit̄ Herb̄ti Vic̃ Eborac̃ attornati sūt Justic̃ ad cap̃ ass̃am de morte añcessoꭄ sumonit̄a corā Justic̃ dñi Reg̃ itīnantibz int̅ Ric̃ de Hauvill̄ & Cecit̄ ux̃ ejus petent̃, & Radm̄ Tirell̄ & Aluin̄a ux̃ ejus teñtes, de xx. acr̃ t̃re cū ptīñ in               , & Batet̄, & mandat̅ est p̄dc̃is q̄ ad diē & locū quē p̄dc̃us Vic̃ eis scire faciat [cŁveniant] ad ass̃am illā capiendam                            p̄ rotl̅m Edm̅.
This transcribes into regular Latin type as:
1215.
  Willelmus filius Willelmi et Adam de Novo Mercato, Adam de Romenith, et Thomas de Horbiri simul cum Petro filio Herberti Vicecomiti Eboraci attornati sunt Justiciarii ad capiendam assisam de morte antecessorum sumonitam coram Justiciariis domini Regis itinerantibus inter Ricardum de Hauvill et Ceciliam uxorem ejus petentes, et Radulfum Tirell et Aluinam uxorem ejus tenentes, de xx. acris terrae cum pertinentiis in         , et Baitel, et mandatum est praedictis quod ad diem et locum quem praedictus Vicecomes eis scire faciat [conveniant] ad assisam illam capiendam.    per rotulum Edmundi.

which translates into English as:
1215.
  William fitz William and Adam de Newmarch [Novo Mercato], Adam de Romney [Romenith], and Thomas de Horbury, together with Peter son of Herbert, sheriff of Yorkshire, are appointed as justices to take an assize of mort d'ancestor summoned before the traveling itinerant justices of our lord the king, between Richard de Hauville and Cecily his wife, plaintiffs, and Ralph Tirell and Alwina his wife, tenants, concerning 20 acres of land with appurtenances in         and Baitel; and it is commanded to the aforesaid [justices] that they shall assemble at the day and place which the aforesaid sheriff shall make known to them to take that assize.  By the roll of Edmund.

This entry from the Close Rolls, dated 1 June 1215, is at the precipice of the Magna Carta crisis, a mere two weeks before king John marched to Runnymede to meet the rebel barons who had already occupied London and renounced their feudal allegiance to the king. Trapped at Windsor Castle, the king was frantically deploying his remaining patronage to guarantee the loyalty of his inner-circle court. Handing Peter "full seisin" of Wolverton "without delay" was an urgent reward designed to ensure Peter remained a loyal frontline crown commander as the realm fractured.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p214 (1833)
1215.
Wlfrintoñ.  R̄ex Vic̃ Suhamt̃ sat̃t̃. P̄cipim̄9 t̅i qd̄ sñ dilōe h̄re fac̃ dilc̃o & fideli nr̃o Petro fit̄ H’berti pleñ saisinā de man̅io de Wlfrintoñ c̅ ptiñ suis salvo unicuig̃ jure suo si quis v̅sus eū iñ loqui volu̅it. T. me ip̅o apud Windeso̧, p̄mo die Juñ.
This transcribes into regular Latin type as:
1215.
Wlfrinton’.  Rex vicecomiti Suhamt’ salutem. Praecipimus tibi quod sine dilatione habere facias dilecto et fideli nostro Petro filio Herberti plenam seisinam de manerio de Wlfrinton cum pertinentiis suis salvo unicuique jure suo si quis versus eum inde loqui voluerit. Teste me ipso apud Windesor’, primo die Junii.

which translates into English as:
1215.
Wolverton.  The king to the sheriff of Southampton greeting. We command you that without delay you cause our beloved and faithful Peter son of Herbert to have full seisin of the manor of Wolverton with its appurtenances, saving to everyone his own right if anyone should wish to speak [bring a legal claim] against him concerning it. Witnessed by myself at Windsor, the 1st day of June.

Peter was the outgoing custodian of Pickering Castle, having been previously granted custody of the stronghold in April 1214, handing over the castle and surrounds to the new sheriff.
Rotuli Litterarum Patentium in Turri Londinensi Asservati 1201-1216 vol 1 part 1 p146 (1835)
This transcribes into regular Latin type as:
1215.
  Idem [Willelmus de Duston’] habet litteras domini Regis patentes directas Petro filio Herberti quod liberet ei castrum de Pikering’ cum villa et wapentak’ de Pikering’ quamdiu domino Regi placuerit custodiendum. Datum ut supra [Rege apud Merleberge, ij. die Julii, anno regni domini Regis xvijmo].

which translates into English as:
1215.
  The same [William de Duston] has letters patent of the lord King directed to Peter son of Herbert that he deliver to him the castle of Pickering with the town and wapentake of Pickering, to be kept for as long as it shall please the lord King. Given as above [the King at Marlborough, 2nd day of July, in the 17th year of the reign of the lord King].

These Close Roll entries from November 1215 and April and May 1216 are during the First Barons' War. Having captured Rochester Castle after a brutal siege, the king redistributed the lands, properties, and livestock of his rebel enemies to reward his staunchest royalist commanders, showering Peter with confiscated estates and knight's fees in Hampshire, Berkshire, Oxfordshire, Somerset and Southampton.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p237 (1833)
1215.
     Tʼre.
   Mandat̅u’ est Vic̃ Suhamt̃ qΪ hr̃e fac̃ Petro fit̄ Herb̄ti t̄ram qΪ fuit Rob̄ Mauduit in Hurtleǧ h̄ndam qΪmdiu dño Regi placūit cū om̄ib̃9 catat̄ł ejusd̄e Rob̄ in t̄ra illa inventis.  Et si quid residuū fūit de tens̃iis fc̃is in ead̄e t̄ra illud similt̄ eidem Petro hr̃e pmittat.  T. R̄. ap̄ Roffam, xvj. die Noṽ.
  Eodem modo mandat̅ est Vic̃ Bercsir̃ p̄ eod̄e de t̄ra qΪ fuit Gileb̄ti fit̄ Reimfr̃ in Dunintoñ, t̄ de t̄ra qΪ fuit Ph̃ de Columbar̃ in Sac, qΪs dñs Rex eid̄ Pet̅o cōmisit qΪmdiu ei placūit.  T. eodem ibidem.
This transcribes into regular Latin type as:
1215.
    Terrae.
  Mandatum est vicecomiti Suhamt’ quod habere facias Petro filio Herberti terram quae fuit Roberti Mauduit in Hurtleg’ habendam quamdiu domino Regi placuerit cum omnibus catallis ejusdem Roberti in terra illa inventis. Et si quid residuum fuerit de tensiis factis in eadem terra illud similiter eidem Petro habere permittat. Teste Rege apud Roffam, xvj. die Novembris.
  Eodem modo mandatum est vicecomiti Bercsir’ pro eodem de terra quae fuit Gileberti filio Reinfredi in Duninton, et de terra quae fuit Philippi de Columbar’ in Sac, quas dominus Rex eidem Petro commisit quamdiu ei placuerit. Teste eodem ibidem.

which translates into English as:
1215.
    Lands.
  It is commanded to the sheriff of Southampton that he cause Peter son of Herbert to have the land which belonged to Robert Mauduit in Hartley, to be held as long as it shall please the lord king, together with all the chattels of the same Robert found in that land. And if any remainder should be left from the tenseries [military protections/ransoms] made in the same land, he shall likewise permit the same Peter to have it. Witnessed by the king at Rochester, the 16th day of November.
  In the same manner it is commanded to the sheriff of Berkshire for the same [Peter], concerning the land which belonged to Gilbert fitz Reinfried in Donnington, and concerning the land which belonged to Philip de Columbers in Shaw, which the lord king has committed to the same Peter as long as it shall please him. Witnessed by the same, at the same place.

By April 1216, the First Barons' War was in full swing, with prince Louis of France preparing to invade England. Peter acted as a mediator between the crown and northern rebel magnates, empowered to receive the northern representative, William de Ros, under royal safe-conduct. Interestingly, William and Peter's daughter, Lucy FitzPiers, were married (was this before or after 1216?).
Rotuli Litterarum Patentium in Turri Londinensi Asservati 1201-1216 vol 1 part 1 p175 (1835)
This transcribes into regular Latin type as:
1216.
  REX Gaufrido de Nevill’ etc. Mandamus vobis quod manucapiatis versus Robertum de Ros et Eustachium de Vescy quod si Willelmus filius ipsius Roberti de Ros ad vos venerit: ipsum non capiemus nec molestabimus nec et si venerit ad dilectum nostrum Petrum filium Herberti. Immo ipsum Willelmum sine redempcione liberabimus prefato Roberto de Ros patri ejus quietum. Et in hujus etc. vobis mittimus. Teste me ipso apud Rading’, ix. die Aprilis, anno regni nostri xvijmo.
  Idem Willelmus filius Roberti de Ros habet litteras de conductu in eundo ad dictum G. de Nevill’ scilicet ad Petrum filium Herberti. Apud Rading’, ix. die Aprilis, anno etc..

which translates into English as:
1216.
  The King to Geoffrey de Neville etc. We command you that you become mainpernor [guarantor] toward Robert de Ros and Eustace de Vesci that if William, the son of the same Robert de Ros, shall come to you: we will not arrest him nor molest him, nor even if he shall come to our beloved Peter son of Herbert. On the contrary, we will deliver the same William without ransom quit [free] to the aforesaid Robert de Ros, his father. And in [witness] of this etc. we send to you. Witness myself at Reading, 9th day of April, in the 17th year of our reign.
  The same William son of Robert de Ros has letters of conduct in going to the said G. de Neville, that is to say to Peter son of Herbert. At Reading, 9th day of April, year etc.
p177
This transcribes into regular Latin type as:
1216.
Custodia puelle.  REX Waltero Foliot et Johanni de Wyghenholt Vicecomiti Berkesire salutem. Sciatis quod commisimus dilecto et fideli nostro Petro filio Herberti Johannam filiam Willelmi de Bocland’ custodiendam quamdiu nobis placuerit. Et ideo vobis mandamus quod eidem Petro vel certo nuncio ejus predictam Johannam sine dilacione liberetis. Et in hujus etc. vobis mittimus. Teste Rege apud Odiham, xv. die Aprilis, anno regni nostri xvijmo.

which translates into English as:
1216.
Custody of a girl.  The King to Walter Foliot and John de Wikenholt, Sheriff of Berkshire, greeting. Know ye that we have committed to our beloved and faithful Peter son of Herbert, Joan, daughter of William de Buckland, to be kept for as long as it shall please us. And therefore we command you that to the same Peter or his certain messenger you deliver the aforesaid Joan without delay. And in [witness] of this etc. we send to you. Witness the king at Odiham, 15th day of April, in the 17th year of our reign..

Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p262b (1833)
1216.
   Mandatu’ est Constabuł Waling̃ qđ hr̃e fac̃ Petro fit̄ Herb̄ t̃ram qΪ fuit Wit̄łi Paẏnełł in Watlintoñ cū ptiñ qΪm dñs Rex ei cōmisit.  ℟ Ap̄ Odihā, xv. die Apr̅.
This transcribes into regular Latin type as:
1216.
  Mandatum est Constabulario Walingfordiae quod habere facias Petro filio Herberti terram quae fuit Willelmi Paynell in Watlinton cum pertinentiis quam dominus Rex ei commisit. Teste apud Odiham, xv. die Aprilis.

which translates into English as:
1216.
  It is commanded to the constable of Wallingford that you cause Peter son of Herbert to have the land which belonged to William Paynel in Watlington with its appurtenances, which the lord king has committed to him. Witnessed at Odiham, the 15th day of April.
p266
1216.
   REX Pet̅o de Maulaẏ t̃c̃. Scias qd̄ cōmisim̄9 dilc̃o & fideli nr̃o Pet̅o filio Herb̅ti t̃ram Ric̃i de Wrotham cū ptiñ [in
Haseber̃ & īo vob̃ mandam̄9 qd̄ ei īñ sñ dilōne pleñ saisinā hr̃e fac̃.] T. me ip̅o apud Dovr̃, xxvij. die Ap̅it̄.
This transcribes into regular Latin type as:
1216.
  Rex Petro de Maulay etc. Sciatis quod commisimus dilecto et fideli nostro Petro filio Herberti terram Ricardi de Wrotham cum pertinentiis [in Haseber’ et ideo vobis mandamus quod ei inde sine dilatione plenam seisinam habere facias.] Teste me ipso apud Dover, xxvij. die Aprilis.

which translates into English as:
1216.  The king to Peter de Maulay greeting. Know ye that we have committed to our beloved and faithful Peter son of Herbert the land of Richard de Wrotham with appurtenances [in Haselbury and therefore we command you that you cause him to have full seisin of it without delay.] Witnessed by myself at Dover, the 27th day of April.
p272b
1216.
     Tʼre.
   REX Vic̃ Suhamt̃ t̃c̃. Scias qd̄ concessim̄9 dilc̃o & fideli nr̃o Petro fit̄ Herb̅ti totam t̃ram qΪ fuit Walt̅i Crok in Septoñ que capta fuit in manu nr̃a pp̅t̄ debitū Judōꭄ custodiendā qΪmdiu nob̃ placūit. Et īo tibi p̄cipim̄9 qΪ eid̄ Petro plenā saisinā īñ hr̃e fac̃. T. me ip̅o ap̄ Wintoñ, xxix. die Maii.
This transcribes into regular Latin type as:
1216.
     Terrae.
  Rex vicecomiti Suhamt’ etc. Scias quod concessimus dilecto et fideli nostro Petro filio Herberti totam terram quae fuit Walteri Crok in Septon quae capta fuit in manu nostra propter debitum Judaeorum custodiendam quamdiu nobis placuerit. Et ideo tibi praecipimus quod eidem Petro plenam seisinam inde habere facias. Teste me ipso apud Winton’ [Wincon’], xxix. die Maii.

which translates into English as:
1216.
    Lands.
  The king to the sheriff of Southampton greeting. Know ye that we have granted to our beloved and faithful Peter son of Herbert all the land which belonged to Walter Crok in Shipton, which was taken into our hand on account of a debt to the Jews, to be held in custody as long as it shall please us. And therefore we command you that you cause the same Peter to have full seisin of it. Witnessed by myself at Winchester, the 29th day of May.
p273b
1216.
     De feodis dat̃.
  MANDATU’ est Viã̃ Vic̃b’ Oxoñ, Glouã̃, Buking̃ & Hertford̄ qđ hr̃e fac̃ Petro fit̄ Her̄bti om̄ia feoda inimicoꭄ dñi Reg̃ que ip̅i de eodem P. ten̅unt in Bailliis suis. T. ut supius [R̄. iã̅o apud Wintoñ, xxxj. die Maii].
This transcribes into regular Latin type as:
1216.
     De feodis datis.
  Mandatum est vicecomitibus Oxon’, Glouc’, Buking’ et Hertford’ quod habere facias Petro filio Herberti omnia feoda inimicorum domini Regis quae ipsi de eodem P. tenent in bailliis suis. Teste ut superius [Rege ipso apud Wintoniam, xxxj. die Maii].

which translates into English as:
1216.
    Concerning fees given.
  It is commanded to the sheriffs of Oxfordshire, Gloucestershire, Buckinghamshire, and Hertfordshire that you cause Peter son of Herbert to have all the fees of the enemies of our lord the king which they hold of the same P[eter] within your bailiwicks. Witnessed as above [by the king himself at Winchester, the 31st day of May].

Prince Louis of France invaded England with a massive army and took control of London. Seeing king John cornered, a huge wave of his core counselors (including the king's own half-brother, William Longespée, earl of Salisbury) realized the royal cause was doomed and defected to the French-baronial alliance. Peter, who had been firmly loyal to king John though the Magna Carta and siege of Winchester followed them into the rebel camp. In response, a furious king John retaliated, stripping the "traitor" Peter of his midland ancestral lands at Alcester and turning them over to the loyalist captain William de Camville.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p280 (1833)
1216.
   MAND’ est Vic̃ Warr̃ qđ hr̃e fac̃ Witto de Cāpvitt t̃ram q̃ fuit Peti fit Herbti in Alencestr̃ cū om̄ibz ptiñ suis hndam
qamdiu dño Regi placūit ni vatat p annū plusqa xij. libr̃. T. Reg̃ apud Blancmustr̃, vj. die Aug̃.
This transcribes into regular Latin type as:
1216.
  Mandatum est vicecomiti Warwici quod habere faciat Willelmo de Camvilla terram quae fuit Petri filii Herberti in Alencestre cum omnibus pertinentiis suis habendam quamdiu domino Regi placuerit nisi valeat per annum plusquam xij. libras. Teste Rege apud Blancmustre, vj. die Augusti.

which translates into English as:
1216.
  It is commanded to the sheriff of Warwickshire that you cause William de Camville to have the land which belonged to Peter son of Herbert in Alcester with all its appurtenances, to be held as long as it shall please the lord king, unless it is worth more than 12 pounds per year. Witnessed by the king at Blancmustre [Whitchurch/Oswestry], the 6th day of August.

As a further consequence of Peter's rebellion, all his lands were temporarily ("as long as it shall please us") confiscated in March 1217 by the regent of the young Henry III in favour of the king's half-brother, Oliver. In April the regent, Earl Marshal, offered Peter a truce encouraging him to abandon the rebellion and Peter returned to crown allegiance before the decisive Battle of Lincoln against prince Louis.
Calendar of the Patent Rolls Henry III 1216-1225 pp42-43 (1901)
1217. … De terra concessa.—Rex omnibus militibus, libere tenentibus et aliis de terris Petri filii Herberti, ubicumque terre ille fuerint, salutem. Sciatis quod commisimus, quamdiu nobis placuerit, dilecto fratri nostro, Olivero filio Regis, totam terram que fuit Petri filii Herberti, ubicumque fuerit, cum omnibus pertinenciis suis, ad se sustentandum in servicio nostro. Et ideo vobis mandamus quod eidem Olivero in omnibus sitis intendentes et respondentes. Et in hujus rei testimonium etc. vobis inde mittimus. Teste eodem.
  De eodem.—Rex omnibus has litteras inspecturis, salutem. Sciatis quod concessimus dilecto fratri nostro, Olivero filio Regis, quamdiu nobis placuerit, totam terram que fuit Petri filii Herberti, cum omnibus pertinenciis suis, ad se sustentandum in servicio nostro. Et in hujus rei testimonium has litteras nostras patentes etc. eidem Olivero fieri fecimus. Teste eodem comite, apud Wintoniam, xx die Marcii, anno regni nostri primo.

This roughly translates as:
1217. … Concerning Land Granted.—The King to all knights, free tenants, and others holding the lands of Peter son of Herbert, wherever those lands may be, greeting. Know ye that we have committed, for as long as it shall please us, to our beloved brother Oliver, son of the King, the whole land which belonged to Peter son of Herbert, wherever it may be, with all its appurtenances, for his maintenance in our service. And therefore we command you that you be intentive and respondent to the same Oliver in all things. And in testimony of this matter, etc., we send this to you. Witnessed by the same.
  Concerning the Same.—The King to all who shall look upon these letters, greeting. Know ye that we have granted to our beloved brother Oliver, son of the King, for as long as it shall please us, the whole land which belonged to Peter son of Herbert, with all its appurtenances, for his maintenance in our service. And in testimony of this matter, we have caused these our letters patent to be made for the same Oliver. Witnessed by the same Earl [of Pembroke] at Winchester, the 20th day of March, in the first year of our reign.
p110
1217.
  Rex nobilibus viris, W. comite Arundell, Petro filio Herberti, Willelmo de Sancto Johanne, et ceteris inprisiis suis, spiritum consilii sanioris. Sciatis quod bene volumus quod habeatis terminum et treugam in eadem forma quam nobis significastis per venerabiles patres nostros, dominum J. Bathoniensem et Glastoniensem et R. Cicestrensem, episcopos, et Alanum Basset et Thomam de Erdinton, usque ad diem Lune proximam ante festum Sancti Marci Ewangeliste, anno regni nostri primo. Et vobis mandamus quod ex parte vestra et inprisiorum vestrorum pacem interim teneatis terris nostris et terris inprisiorum nostrorum. Et in hujus rei testimonium, has litteras nostras. Et in hujus rei testimonium etc. (sic) vobis inde mittimus. Teste comite, apud Wintoniam, viij. die Aprilis, anno regni nostri primo.

1217.
  The King to the noble men, W. Earl of Arundel, Peter son of Herbert, William de St. John, and the rest of their partisans [adherents], [wishing them] the spirit of wiser counsel. Know ye that we willingly grant that you may have a truce and truce-term in the same form as you indicated to us through our venerable fathers, the lord J[ocelin], bishop of Bath and Glastonbury, and R[anulf], bishop of Chichester, and Alan Basset and Thomas de Erdington, until the Monday next before the feast of Saint Mark the Evangelist, in the first year of our reign [24 April 1217]. And we command you that on your part and on the part of your partisans you maintain peace in the meantime with our lands and the lands of our partisans. And in testimony of this matter, these our letters. And in testimony of this matter etc. (sic) we send to you thereof. Witness the Earl [Marshal], at Winchester, 8th day of April, in the first year of our reign.

By accepting the pardon offer from the crown and returning to royalist allegiance, Peter regained his original lands as well as some of the lands given to him temporarily after their confiscation from other rebel barons in 1215.
Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p314 (1833)
1217.
   PETR’ fit̄ Herb̅ti rediit ad pacē & s̅viciū dñi Regis & mand̄ e̅ Vic̃ Glouc̃, Warewic̃, Wiltisir̃, Eboꭄ sicud px̧i̧o supius [qđ faciant ei h̅re talē saisinā de ōmibz t̅ris c̅ ptiñ suis in Baillia sua qualē inde h̅uit die qa recessit a fide & s̅vico dñi J. Regis pr̃is Henr̅ R̃]. T. Com̅ apđ Strigoyľ, t̅cio decimo die Juł.
This transcribes into regular Latin type as:
1217.
  Petrus filius Herberti rediit ad pacem et servicium domini Regis et mandatum est vicecomitibus Gloucestrie, Warewici, Wiltisire, Eboraci sicut proximo superius [quod faciant ei habere talem saisinam de omnibus terris cum pertinentiis suis in baillia sua qualem inde habuit die qua recessit a fide et servicio domini Johannis Regis patris Henrici Regis]. Teste Comite apud Strigoyl, tercio decimo die Julii.

which translates into English as:
1217.
  Peter son of Herbert has returned to the peace and service of our lord the king, and it is commanded to the sheriffs of Gloucestershire, Warwickshire, Wiltshire, [and] Yorkshire, in the same manner as next above [that they cause him to have such seisin of all his lands with their appurtenances within their bailiwick as he held on the day when he withdrew from the faith and service of lord king John, father of king Henry]. Witnessed by the Earl at Chepstow [Strigoyl], the thirteenth day of July.
p316
1217.
   REX ven̄abli pat̅i in Xp̅o P. ead̄e gr̃a Wintoñ Ep̄o sat̃ł. Sciatis qđ Petr̅9 filius Herb̅ti rediit ad fid̄ē & serviciū ñrm. Et iđo võb mandam̄9 qđ sine dil̅ōne talē saisinā ei h̅re faciatis de mañio de Estleǧ quod est de feodo suo & de mañio de Hurtleǧ quod fuit Rob̄ti Maudut; qΪlem īñ h̅uit die qa recessit a serviã̃o dñi Reg̃ J. pat̅is ñri. Et q’a nōdū h̅uim̄9 sigillū t̃c̃a. T. Coñ ut p̧x̧o supa [apud Oxoñ, xxiiij̅o. die Juł].
This transcribes into regular Latin type as:
1217.
  Rex venerabili patri in Christo P[etro] eadem gratia Wintoniensi Episcopo salutem. Sciatis quod Petrus filius Herberti rediit ad fidem et servicium nostrum. Et ideo vobis mandamus quod sine dilatione talem saisinam ei habere faciatis de manerio de Estlegh quod est de feodo suo et de manerio de Hurtlegh quod fuit Roberti Mauduit; qualem inde habuit die qua recessit a servicio domini Regis Johannis patris nostri. Et quia nondum habuimus sigillum etcetera. Teste Comite ut proximo supra [apud Oxoniam, xxiiij°. die Julii].

which translates into English as:
1217.
  The King to the venerable father in Christ, P[eter des Roches], by the same grace Bishop of Winchester, greeting. Know ye that Peter son of Herbert has returned to our faith and service. And therefore we command you that without delay you cause him to have such seisin [possession] of the manor of Eastley which is of his fee, and of the manor of Hartley which belonged to Robert Mauduit: as he held thereof on the day when he withdrew from the service of lord King John, our father. And since we have not yet a seal, etc. Witnessed by the Earl as next above [at Oxford, the 24th day of July].
p320b
1217.
   REX Regiñ de Brewos̃ sat̃ł. Mandam̄9 võb qđ sñ dil̅ōne pleñã saisinā h̅re faciatis dilc̃o & fideli ñro Pet̅o filio Herb̅ti qui ad fidem & serviciū ñrm est de cast̅ls & t̅ris suis cū ptiñ in Ballia vr̃a. T. Com̅ apđ Certeš, ix̅o. die Sept̃.
This transcribes into regular Latin type as:
1217.
  Rex Reginaldo de Brewos salutem. Mandamus vobis quod sine dilatione plenam saisinam habere faciatis dilecto et fideli nostro Petro filio Herberti, qui ad fidem et servicium nostrum est, de castris et terris suis cum pertinentiis in Ballia vestra. Teste Comite apud Certes’, ix°. die Septembris.

which translates into English as:
1217.
  The King to Reginald de Braose greeting. We command you that without delay you cause our beloved and faithful Peter son of Herbert, who is in our faith and service, to have full seisin of his castles and lands with appurtenances within your bailiwick. Witnessed by the Earl at Chertsey, the 9th day of September.

Rotuli litterarum clausarum in Turri Londinensi asservati 1204-1224 vol 1 p490 (1833)
1222.
 D’ fil’ & h̃ede Johis fil’ Hugōis.
  MANDAT’ est P. fit̄ Hereb̄ qđ filiū & heredē Joh̃is fit̄ Hugōis qⁱ mortuus est qui est ī custodia sua, & cuj9 custodia ad dñm Regē ptinet rōne tenem̃ti qđ ip̃e de dño Rege tenuit ī capite: h̅re faciat H. de Burgo Justic̃. T. H. tc̃. ap̃ Skenefrith, vij. die Marc̃.
This transcribes into regular Latin type as:
1222.
De filio et herede Johannis filii Hugonis.
  Mandatum est P[etro] filio Herberti quod filium et heredem Johannis filii Hugonis qui mortuus est, qui est in custodia sua, et cujus custodia ad dominum Regem pertinet ratione tenementi quod ipse de domino Rege tenuit in capite: habere faciat H[uberto] de Burgo Justiciario. Teste H[uberto] etcetera apud Skenefrith, vij. die Marcii.

which translates into English as:
1222.
Concerning the son and heir of John fitz Hugh.
  It is commanded to P[eter] son of Herbert that the son and heir of John fitz Hugh, who is dead, and who is in his custody, and whose wardship belongs to our lord the King by reason of the tenement which he held of our lord the King in chief: he cause H[ubert] de Burgh, the Justiciar, to have him. Witnessed by H[ubert] etc. at Skenfrith, the 7th day of March.
p616
1224.
D’ pdoñ xxx. marc̃.
  REX Bar̃ de Scªc̃io sat̃ł. Sciatis qđ pdonavim9 Petrᵒ fit̃ H’eb̃ti xxx. m̃. quas nob̃ [debet] de fine xl. m̃. quē nob̃c̃ fecit p h̃nda custodia t̃re & h̃edis Joh̃ fit̃ Hug̃. Et io vo𝔷 mandam9 qđ de itt xxx. m̃. ip̃m Petrū q’etū ee faciatis. T. R̃. ap̃ Bed̃, xvj. die Aug̃, anno viij. Corā Justic̃.
This transcribes into regular Latin type as:
1224.
De pardonatione xxx. marcarum.
  Rex Baronibus de Scaccario salutem. Sciatis quod pardonavimus Petro filio Herberti xxx. marcas quas nobis [debet] de fine xl. marcarum quem nobiscum fecit pro habenda custodia terrae et heredis Johannis filii Hugonis. Et ideo vobis mandamus quod de illis xxx. marcis ipsum Petrum quietum esse faciatis. Teste Rege apud Bedfordiam, xvj. die Augusti, anno octavo. Coram Justiciario.

which translates into English as:
1224.
Concerning the pardon of 30 marks.
  The King to the barons of the exchequer, greeting. Know ye that we have pardoned to Peter son of Herbert 30 marks, which he [owes] us of a fine of 40 marks which he made with us for having the wardship of the land and heir of John fitz Hugh. And therefore we command you that, concerning those 30 marks, you cause the same Peter to be quit thereof. Witnessed by the King at Bedford, the 16th day of August, in the eighth year. Before the Justiciar.

Rotuli litterarum clausarum in Turri Londinensi asservati 1224-1227 vol 2 pp78b-79 (1844)
1225.
  Norh̃t̃ p Petᵒ fit H’ebti.
  REX Martino de Patesh̃ & soc̃ suis tc̃. ī Cōm Norh̃t̃. Mandam9 voβ qđ assisā de morte antecess̃ q̃ sūmonita est corā voβ int̃ Hug̃ de Mortuo Mari pet̃ & Petum fit Hereβ cuj9 fit pⁱmogenit9 est ī s̃vic̃o nr̃o ī Wascoñ cũ Ric̃ fr̃e nr̃o p p̃cep̃t̃ nr̃m & Isabełł ux̃ ejus teñ de tⁱbus carucatis t̃re cũ ptiñ ī Langebergh̃: ponatis ī resp̃cm usqꭄ ad adveñ alioꝝ Justic̃ ī ptes illas. T. R̃. ap̃ Windles̃, xxix. die Juł.
This transcribes into regular Latin type as:
1225.
  Northampton. Pro Petro filio Herberti.
  Rex Martino de Pateshull et sociis suis etc. in comitatu Northampton. Mandamus vobis quod assisam de morte antecessoris quae summonita est coram vobis inter Hugonem de Mortuo Mari petentem, et Petrum filium Hereberti, cujus filius primogenitus est in servicio nostro in Wasconia cum Ricardo fratre nostro per praeceptum nostrum, et Isabellam uxorem ejus tenentes, de tribus carucatis terrae cum pertinentiis in Langebergh: ponatis in respectum usque ad adventum aliorum Justiciariorum in partes illas. Teste Rege apud Windlesoram, xxix. die Julii.

which translates into English as:
1225.
  Northamptonshire. For Peter son of Herbert.
  The King to Martin de Pateshull and his associates, [justices] etc. in the county of Northampton. We command you that the assize of mort d'ancestor which is summoned before you between Hugh de Mortimer, plaintiff, and Peter son of Herbert, whose eldest son is in our service in Gascony with Richard our brother by our command, and Isabella his wife, tenants, concerning three carucates of land with appurtenances in Longborough: you put in respite [postpone] until the arrival of other Justices into those parts. Witnessed by the King at Windsor, the 29th day of July.
p155b
1226.
  MAND’ est M. de Patesh̃ & soc̃ suis assigatis ī Cōm Eboꝝ qđ ad petic̃oem Petⁱ fit Hereb̃ti om̃s assisas tā ultie presētac̃ois qa nove dissais̃, qas id̃ Petr9 arainiavit ṽs9 Priorē de Sc̃o Oswaldo & Thom̃ de Lintuñ & Joh̃em de Arcune ī Cōm Eboꝝ ponāt ī respectū usq̃ ad pximū reditū suū ap̃ Westm̃.  T. R̄. ap̃ Westm̃, iiij. die Octobꝝ.
This transcribes into regular Latin type as:
1226.
  Mandatum est M[artino] de Pateshull et sociis suis assignatis in comitatu Eboraci quod ad petitionem Petri filii Hereberti omnes assisas tam ultimae praesentacionis quam novae disseisinae, quas idem Petrus arainiavit versus Priorem de Sancto Oswaldo et Thomam de Linton et Johannem de Arcune in comitatu Eboraci ponant in respectum usque ad proximum reditum suum apud Westmonasterium. Teste Rege apud Westmonasterium, iiij. die Octobris.

which translates into English as:
1226.
  It is commanded to M[artin] de Pateshull and his associates, [Justices] assigned in the county of York, that at the petition of Peter son of Herbert, they put in respite [postpone] all assizes, as well of darrein presentment [last presentation to a church] as of novel disseisin [recent unlawful eviction], which the same Peter has arraigned against the Prior of St. Oswald, and Thomas de Linton, and John de Arcune in the county of York, until his next return to Westminster. Witnessed by the King at Westminster, the 4th day of October.
p178b
1227.
p̃ Petᵒ fit̄ Hereb̄.
MAND’ est H. de Nevit̄ qđ pmittat Petrū fit Hereb̄ cape x. damas & tres broket̃ in foresta de Saṽnac de dono dñi R̃. nisi eos alias h̃uit p p̃cept̃ dñi R̃. T. R̃. ap̃ Westm̃, xxvj. die Marc̃.
This transcribes into regular Latin type as:
1227.
Pro Petro filio Hereberti.
Mandatum est H[ugoni] de Neville quod permittat Petrum filium Hereberti capere x. damas et tres broketos in foresta de Savernake de dono domini Regis, nisi eos alias habuit per praeceptum domini Regis. Teste Rege apud Westmonasterium, xxvj. die Marcii.

which translates into English as:
1227.
For Peter son of Herbert.
It is commanded to H[ugh] de Neville that he permit Peter son of Herbert to take 10 doe deer and three brockets [young red deer stags] in the forest of Savernake, as a gift of the lord King, unless he has had them elsewhere by command of the lord King. Witnessed by the King at Westminster, the 26th day of March.
p186b
1227.
p Petrᵒ fit̃ Hereb̃ti.
REX Vic̃ Suhāpt̃ [sat̃ł]. Ostendit nob̃ dilc̃s & fidēł nr̃ Petr9 fit̃ H’rβti qđ cũ tenuisset qundā t̃rā ī Werdlehā que est de feodo suo & eā pacifice posedisset, tu ppʼa aucte tua de gªngia ip̃ius serā qua firmata fuit amovisti & serā tuā apposuisti ijuste ip̃m de t̃ra p̃dc̃a disseisiendo ut dic̃. De quo qⁱdē si ita fũit valde miramr. Et īo tⁱ p̃cipim9 qđ p visū pboꝝ & leg̃ hoīū bladū ī gªngia p̃dc̃a īvẽtū appciari facias & p p̃cio illo eidẽ Petᵒ bladū ittđ dimittas, nob̃ sñ ditōne p littas tuas sig̃catur9 qua occōne de p̃dc̃is sñ p̃cepto ñro tat̃r te int̃misisti. T. me ip̃o ap̃ Westm̃, xxij. die Maii.
This transcribes into regular Latin type as:
1227.
Pro Petro filio Hereberti.
Rex vicecomiti Suhamt’ [salutem]. Ostendit nobis dilectus et fidelis noster Petrus filius Herberti quod cum tenuisset quandam terram in Werdleham quae est de feodo suo et eam pacifice possedisset, tu propria auctoritate tua de grangia ipsius seram qua firmata fuit amovisti et seram tuam apposuisti injuste ipsum de terra praedicta disseisiendo ut dicitur. De quo quidem si ita fuerit valde miramur. Et ideo tibi praecipimus quod per visum proborum et legalium hominum bladum in grangia praedicta inventum appreciari facias et pro precio illo eidem Petro bladum illud dimittas, nobis sine dilatione per litteras tuas significaturus qua occasione de praedictis sine praecepto nostro taliter te intromisisti. Teste me ipso apud Westmonasterium, xxij. die Maii.

which translates into English as:
1227.
For Peter son of Herbert.
The King to the sheriff of Southampton [Hampshire] greeting. Our beloved and faithful Peter son of Herbert has shown to us that, whereas he had held a certain land in Worldham which is of his fee and had peacefully possessed it, you, by your own authority, removed from his grange the lock with which it was fastened, and affixed your own lock, unjustly disseising him of the aforesaid land, as it is said. Concerning which matter, if it indeed be so, we marvel greatly. And therefore we command you that, by the view of upright and lawful men, you cause the grain found in the aforesaid grange to be appraised, and for that price you release that grain to the same Peter, certifying to us without delay by your letters by what occasion you intermeddled yourself in such a manner in the aforesaid matters without our command. Witnessed by myself at Westminster, the 22nd day of May.
p190
1227.
p̃ Petᵒ fit̄ Hereb̄.
MAND’ est Rogo de Clifford̄ qđ pmittat Petrū filiū Hereb̃ti cape duos c̃vos in foresta de Dene de dono dñi R̄. T. R̄. ap̅ Westm̃, xx. die Juñ, anno xj̅o.
This transcribes into regular Latin type as:
1227.
Pro Petro filio Hereberti.
Mandatum est Rogo de Clifford quod permittat Petrum filium Hereberti capere duos cervos in foresta de Dene de dono domini Regis. Teste Rege apud Westmonasterium, xx. die Junii, anno undecimo.

which translates into English as:
1227.
For Peter son of Herbert.
It is commanded to Roger de Clifford that he permit Peter son of Herbert to take two stags in the forest of Dean, as a gift of our lord the King. Witnessed by the King at Westminster, the 20th day of June, in the eleventh year.
p200
1227.
p Decano & Capitulo Rotom̃.
DECANUS & Capitulū Rotomag̃ de licenc̃ dñi R̄. retornent se ī ass̃ nove diss̃ quā arainiavnt ṽs9 Petrū fit̃ H’eb̃ de teñ ī villa Sc̃e Marie de Ot̃rẏ unde amicabit̃r ut dix̃nt int̃ eos cōvenit. Et mand̃ est Henr̃ de Trªcẏ & soc̃ suis Justic̃ inde 9stitutis qđ p̃dc̃am ass̃ remañe & ip̃os Dec̃ & Capitul̃ & pt̃ suos de p̃s quietos ẽe faciant. T. ut sª [R̄. ap̃ Windles̃, viij. die Sept̃].
This transcribes into regular Latin type as:
1227.
Pro Decano et Capitulo Rotomagensi.
Decanus et Capitulum Rotomagenses de licencia domini Regis retornerunt se in assisa novae disseisinae quam arainiaverunt versus Petrum filium Herberti de tenemento in villa Sanctae Mariae de Otry unde amicabiliter ut dixerunt inter eos convenit. Et mandatum est Henrico de Tracy et sociis suis Justiciariis inde constitutis quod praedictam assisam remanere et ipsos Decanum et Capitulum et plegios suos de misericordia quietos esse faciant. Teste ut supra [Rege apud Windlesoram, viij. die Septembris].

which translates into English as:
1227.
For the Dean and Chapter of Rouen.
The Dean and Chapter of Rouen, by license of our lord the King, have withdrawn themselves from the assize of novel disseisin [recent unlawful eviction] which they had arraigned against Peter son of Herbert concerning a tenement in the vill of St. Mary of Ottery [Ottery St. Mary], whereof it has been amicably agreed between them, as they have said.And it is commanded to Henry de Tracy and his associates, Justices appointed for this matter, that they cause the aforesaid assize to be stayed, and cause the same Dean and Chapter, and their guarantors, to be quit of amercement [court fines]. Witnessed as above [the King at Windsor, the 8th day of September].

Peter was given deer by the king to stock his deer park at Leckhampstead, a manor he inherited from his mother.
Calendar of the Close Rolls Henry III 1227-1231 pp32-33 (1902)
1228.
De damis datis.—Mandatum est Hugoni de Nevill’ quod habere faciat Petro filio Hereberti sex damos in foresta nostra de Merleberg’, ponendos in parco suo de Lechamsted’, de dono nostro. Teste rege apud Rading’, iiij die Aprilis.
This roughly translates as:
  Concerning buck deer given.—It is commanded to Hugh de Neville that he cause Peter son of Herbert to have six buck deer in our forest of Marlborough, to be placed in his park of Leckhampstead, as our gift. Witnessed by the king at Reading, the 4th day of April.

Calendar of the Charter Rolls Henry III 1226-1257 p72 (1903)
1228. April 20.
Westminster.
  Grant to Peter son of Herbert of warren for the fox, the hare and the roe in his land of Wulfreton, Akele, Hampton and in the hundred of Clere.

This entry refers to the Hospital of St. John the Baptist at Lechlade, which Peter formally founded in the 1220s, next to the primary bridge over the River Thames. In the 13th century, a "hospital" was an ecclesiastical almshouse and chapel complex run by an Augustinian prior and monks, built to offer free shelter, medical care, and food to poor travelers, pilgrims, and local infirm unfortunates. Because Peter had built the bridge and its raised earthen approach causeway, he wanted to erect a formal gate structure directly in front of his new hospital. The king approves the project on the condition that the gate must remain permanently open and clear to everyday commercial traffic, ensuring that pedestrians, mounted knights, and heavy trade wagons can cross the Thames freely without extortion or obstruction.
Calendar of the Close Rolls Henry III 1227-1231 p82 (1902)
1228.
Pro Petro filio Hereberti.—Mandatum est vicecomiti Gloucestrie quod permittat Petrum filium Hereberti levare quandam portam super calcetam pontis Lechelad’ coram hospitali quod ibidem construxit, salva transeuntibus, tam peditibus quam equitibus et carectis, absque impedimento communi via sua. Teste rege apud Kery, xxvij die Septembris.
This roughly translates as:
  For Peter son of Herbert.—It is commanded to the sheriff of Gloucestershire that he permit Peter son of Herbert to erect a certain gate upon the causeway of the bridge of Lechlade in front of the hospital which he has constructed there, saving to those passing by, as well pedestrians as horsemen and carts, without impediment to their common way. Witnessed by the king at Kerry, the 27nd day of September.
p156
1229.
Pro Petro filio Hereberti.—Quia protestatum est coram rege quod Petrus filius Hereberti habuit milites suos cum domino J. rege in ultimo itinere suo in Pictavia, mandatum est baronibus de Scaccario quod de sex marcis que ab eodem Petro exiguntur per summonitionem Scaccarii de scutagio predicti itineris, ipsum Petrum quietum esse faciant. Teste ut supra [rege apud Croinden’, xxiij die Februarii].
This roughly translates as:
  For Peter son of Herbert.—Because it has been testified before the king that Peter son of Herbert had his knights with lord King John, in his last journey in Poitou [in 1214], it is commanded to the barons of the exchequer that, concerning the six marks which are exacted from the same Peter by summons of the exchequer for the scutage of the aforesaid journey; they cause the same Peter to be quit thereof. Witnessed as above [the king at Croydon, the 23rd day of February].

In 1229, Herbert prepared to participate in Henry III's unsuccessful military expedition to France to support a revolt against the young king of France, Louis IX. The expedition failed to leave Portsmouth in its planned October 1229 departure from Portsmouth due to logistics failures and only departed the following April.
Calendar of the Patent Rolls Henry III 1225-1232 p311 (1901)
1229.
  Rex omnibus ballivis etc. salutem. Mandamus vobis quod manuteneatis, protegatis et defendatis homines, terras, res, redditus et possessiones dilecti et fidelis nostri Petri filii Hereberti, qui profectus est nobiscum ad partes transmarinas per preceptum nostrum; non inferentes eis vel inferri permittentes injuriam, molestiam, dampnum aut gravamen, quamdiu fuerit nobiscum in partibus transmarinis per preceptum nostrum; et si quid eis forisfactum fuerit, id eis sine dilatione faciatis emendari. Teste me ipso, apud Portesmue, xix die Octobris, anno regni nostri xiij.
This roughly translates as:
  The King to all bailiffs etc., greeting. We command you that you maintain, protect, and defend the men, lands, things, rents, and possessions of our beloved and faithful Peter son of Herbert, who has set out with us to parts beyond the seas by our command; not bringing upon them, nor permitting to be brought upon them, injury, molestation, damage, or grievance, for as long as he shall be with us in parts beyond the seas by our command; and if anything shall have been forfeited [done amiss] against them, you shall cause it to be amended to them without delay. Witness myself, at Portsmouth, 19th day of October, in the 13th year of our reign.

Calendar of the Close Rolls Henry III 1227-1231 p265 (1902)
1229.
De damis datis.
… Mandatum est Galfrido Esturmy quod habere faciat Petro filio Hereberti x damas et duos brokettos in balliva sua de dono regis, ponendos in quodam parco suo. Teste ut supra [rege apud Oxoniam, xviij die Novembris].
This roughly translates as:
  For Peter son of Herbert.
… It is commanded to Geoffrey Esturmy that he cause Peter son of Herbert to have 10 doe deer and two brockets [young red deer stags] within his bailiwick, as a gift of the king, to be placed in a certain park of his. Witnessed as above [the king at Oxford, the 18th day of November].
p273
1229.
De roboribus datis.—Mandatum est Hasculfo de Nevill’ quod habere faciat Petro filio Hereberti v vetera robora de dono regis in balliva sua ad focum suum. Teste rege apud Croxton’, xiij die Decembris.
This roughly translates as:
  Concerning oak trees given.—It is commanded to Hasculf de Neville that he cause Peter son of Herbert to have 5 old oak logs as a gift of the king within his bailiwick for his hearth [firewood]. Witnessed by the king at Croxton, the 13th day of December.

In 1230 Peter went with king Henry III on his expedition to Brittany. Ongoing lawsuits against Peter were halted while he was in the king's service.
Calendar of the Close Rolls Henry III 1227-1231 pp333-334 (1902)
1230.
  De loquelis ponendis in respectum.—Mandatum est justiciariis de Banco quod loquelam que est coram eis apud Westmonasterium inter Willelmum de Gamag’, petentem, qui profectus est cum rege ad partes transmarinas, et Osbertum Smeth’, Walterum de Strafford’, Robertum de Strafford’, Radulfum le Pelerin, et Oliverum de Eton’, tenentes de terra in Eton’, ponant in respectum quamdiu idem Willelmus fuerit in partibus transmarinis etc. Teste ut supra [me ipso apud Portesmue, xix die Aprilis, anno regni nostri xiiij].
… Eodem modo scribitur—justiciariis de Banco pro Gileberto Basset...eisdem pro Petro filio Hereberti de loquela que est inter Fulconem filium Warini petentem, et eum tenentem, de manerio de Staunton’, ponenda in respectum etc.
This roughly translates as:
  Concerning lawsuits to be put in respite.—It is commanded to the justices of the Bench that the lawsuit which is before them at Westminster between William de Gamages, plaintiff, who has set out with the king to parts overseas, and Osbert Smith, Walter de Strafford, Robert de Strafford, Ralph le Pelerin, and Oliver de Eaton, tenants, concerning land in Eaton: they put in respite for as long as the same William shall be in parts overseas etc. Witnessed as above [myself at Portsmouth, on the 19th day of April, in the 14th year of our reign].
… In the same manner it is written—To the justices of the Bench for Gilbert Basset...To the same [justices] for Peter son of Herbert, concerning the lawsuit which is between Fulk fitz Warin, plaintiff, and him [Peter], tenant, concerning the manor of Stanton [Staunton’], to be put in respite etc.

Meanwhile Peter was also expected to deal with the capture and ransoming of William de Braose by Llywelyn in Wales, specifically by taking control of de Braose's castles in the area to prevent them falling into Welsh hands. This responsibility was soon handed off as Peter was required on the Brittany expedition which departed on 30 April.
Calendar of the Patent Rolls Henry III 1225-1232 p336 (1901)
1230.
   De castris Willelmi de Braosa.—Rex constabulario W. de Braosa de Radenour, salutem. Datum est nobis intelligi quod L. princeps Norwallie cepit W. de Braosa, dominum vestrum, et detinet imprisonatum, unde plurimum dolemus et cujus deliberationem valde desideramus. Quia igitur tam nobis quam ipsi domino vestro expedit ut castra sua interim salvo custodiantur, vobis mandamus, firmiter injungentes in fide qua nobis tenemini, quatinus castrum de Radenour liberetis dilectis et fidelibus nostris Petro filio Hereberti et Johanni de Monemue, quibus illud commisimus custodiendum ad securitatem nostram et ipsius domini vestri, donec Dominus eum liberaverit. Teste ut supra [me ipso, apud Portesmue, xx die Aprilis, anno regni nostri xiiij].
  Eodem modo scribitur constabulario de Haya, et constabulario de Huntinton, et constabulario de Brechinnijo, et constabulario de Bergeveny.
This roughly translates as:
  Concerning the castles of William de Braose.—The King to the constable of W. de Braose of Radnor, greeting. It has been given us to understand that L[lywelyn], prince of North Wales, has captured W[illiam]. de Braose, your lord, and detains him imprisoned, whereat we grieve exceedingly and whose release we greatly desire. Because therefore it is expedient both to us and to your lord himself that his castles be safely kept in the meantime, we command you, firmly enjoining in the faith by which you are bound to us, that you deliver the castle of Radnor to our beloved and faithful Peter son of Herbert and John of Monmouth, to whom we have committed it to be kept for our security and that of your lord himself, until the Lord shall set him free. Witness as above [by my own hand, at Portsmouth, on the 20th day of April, in the 14th year of our reign].
  In the same manner it is written to the constable of Hay, and to the constable of Huntington, and to the constable of Brecon, and to the constable of Abergavenny.
p339
1230.
   De terris et castris Willelmi de Braosa.—Rex commisit W. comiti Marescallo omnes terras et tenementa et castra Willelmi de Braosa cum omnibus pertinenciis suis quamdiu in prisona fuerit, custodienda ad indempnitatem et commodum ipsius Willelmi et ad respondendum ipsi Willelmo de exitibus eorum quamcitius a prisona fuerit liberatus. Et mandatum est constabulario de Bergeveny quod castrum illud cum omnibus terris ipsius Willelmi in manu et custodia sua existentibus, predicto comiti sine dilatione liberet, non obstante precepto regis quod prius fecit de terris et castris ipsius Willelmi, Petro filio Hereberti et Johanni de Monemue committendis et salvo custodiendis. In cujus rei etc. Teste rege, apud Portesmue, xxvij die Aprilis.
  Eodem modo scribitur constabulariis:—
    de Toten[eis].
    de Stratmelthin.
    de Brechennio.
    de Sancto Claro.
    de Huntindon.
    da Haya.
    de Radenor.
    Ballivo de Kingeslen et Erleslen.
This roughly translates as:
  Concerning the lands and castles of William de Braose.—The King has committed to W[illiam], Earl Marshal, all the lands and tenements and castles of William de Braose with all their appurtenances for as long as he shall be in prison, to be kept for the indemnity and advantage of the same William and to answer to the same William for the issues [revenues] thereof as soon as he shall be delivered from prison. And it is commanded to the constable of Abergavenny that he deliver that castle without delay to the aforesaid earl, together with all the lands of the same William existing in his hand and custody, notwithstanding the king's command which he previously made concerning committing and safely keeping the lands and castles of the same William to Peter son of Herbert and John of Monmouth. In [witness] of which thing etc. Witness the king, at Portsmouth, 27th day of April.
  In the same manner it is written to the constables:
    of Totnes.
    of Ystradfellte (Stratmelthin).
    of Brecon.
    of St. Clears.
    of Huntington.
    of Hay.
    of Radnor.
    To the bailiff of Kingsland and Eardisland.

Calendar of the Close Rolls Henry III 1227-1231 p557 (1902)
1231.
  Pro Fulcone filio Warini.—Mandatum est justiciariis de Banco quod loquelam, que fuit inter Fulconem filium Warini petentem et Petrum filium Hereberti tenentem, de medietate manerii de Stanton’ cum pertinentiis, et quam rex precepit poni in respectum usque ad reditum suum de partibus transmarinis, ut dicitur, faciant resummoneri ita quod sit coram eis a die Sancti Michaelis in tres septimanas in eodem statu quo remansit per preceptum regis. Teste rege apud Castrum Matildis, xv die Septembris.
This roughly translates as:
  On behalf of Fulk, son of Warin..—It is commanded to the justices of the Bench that the lawsuit which was between Fulk, son of Warin, demandant [plaintiff], and Peter, son of Herbert, tenant [defendant], concerning half of the manor of Stanton with its appurtenances, and which the King had ordered to be put in respite [postponed] until his return from parts overseas, as it is said, they shall cause to be resummoned so that it may be before them three weeks from the day of Saint Michael, in the same state in which it remained by command of the king. Witnessed by the king at Painscastle, on the 15th day of September.
pp591-592
1231.
  Mandatum est Petro filio Hereberti quod, eum oporteat regem factum et collationem H. regis avi sui tueri et warantizare, non inquietet priorissam et moniales de Ambresbir’ de quadam terre in Wellop’, quam habent  de dono H. regis, et quam idem P. trahit in placitam, ut dicitur. Teste rege apud Rading’, vj die Julii.
This roughly translates as:
It is commanded to Peter son of Herbert, since it is incumbent upon him to uphold and warrant the grant made by King Henry, his grandfather, not to disturb the prioress and nuns of Amesbury regarding certain land in Wallop which they hold by the gift of king Henry, and which the said Peter is bringing into litigation, as is alleged. Witnessed by the king at Reading, the 6th day of July.

Calendar of the Close Rolls Henry III 1231-1234 pp1-2 (1905)
1231.
 
De capreolis datis.—Mandatum est Galfrido Esturmy quod in bruilliis regis de Bedewinde faciat habere Petro filio Hereberti tres capreolos de dono regis. Teste ut supra [rege apud Merleberg’, ij. die Novembris].
  Pro Petro filio Hereberti.—Mandatum est Hasculfo de Nevill’ quod non inpediat quominus homines Petri filii Hereberti colligere possint singulis annis per unum diem nuces in foresta regis de Rotel’ ad opus ipsius Petri, sicut eas colligere debent et solent. Teste ut supra.
This roughly translates as:
  Concerning roebucks given.—It is commanded to Geoffrey Esturmy that in the king’s copsewood of Bedwyn he cause Peter son of Herbert to have three roebucks as a gift of the king. Witness as above [the king at Marlborough, 2nd day of November].
  For Peter son of Herbert.—It is commanded to Hasculf de Neville that he do not hinder the men of Peter son of Herbert from being able to gather nuts every year for one day in the king’s forest of Rutland for the use of the same Peter, as they ought and are accustomed to gather them. Witness as above.

Calendar of the Patent Rolls Henry III 1225-1232 p469 (1901)
1232.
   Pro Petro filio Hereberti.—Rex concessit Petro filio Hereberti quod quandocunque voluerit, libere et sine inpedimento condat testamentum suum de bladis suis tunc solo herentibus et de aliis bonis, rebus et catallis suis. In cujus etc.
This roughly translates as:
  For Peter son of Herbert.—The King has granted to Peter son of Herbert that whenever he shall wish, freely and without impediment he may make his testament [will] concerning his corn [crops] then growing in the soil and concerning his other goods, things, and chattels. In [witness] of which thing etc.
p478
1232.
 Rex Petro filio Herberti et Isabelle uxori ejus, salutem. Veniens ad nos Henricus de Fraxneto, nobis monstravit quod terram que fuit Reginaldi de Fraxneto, patris sui Normanni, cujus heres ipse est, ut dicit, in Belton, et est de feodo de Ocham, ei redderetis si nobis placeret. Et ideo vobis significamus quod bene placet nobis quod terram illam ei reddatis, si id facere volueritis. In cujus rei testimonium etc. Teste ut supra [rege, apud Gloucestre, vij. die Junii].
This roughly translates as:
  The King to Peter son of Herbert and Isabella his wife, greeting. Coming to us Henry de Fraxneto [de Ash], has shown to us that the land which belonged to Reginald de Fraxneto, his Norman father, whose heir he is, as he says, in Belton, and which is of the fee of Oakhampstead [or Oakham], you would restore to him if it should please us. And therefore we signify to you that it well pleases us that you restore that land to him, if you be willing to do so. In testimony of which thing etc. Witness as above [the king, at Gloucester, 7th day of June].

Calendar of the Close Rolls Henry III 1231-1234 p206 (1905)
1233.
 
De capreolis datis.—Mandatum est P. de Rivall’ quod in foresta de Arundell’, que est in custodia sua per preceptum regis, faciat habere Petro filio Herberti v. capreolos de dono regis. Teste rege apud Otteford’, x. die Aprilis. Per Radulfum filium Nicholai.
This roughly translates as:
  Concerning roebucks given.—It is commanded to P[eter] de Rivaux that in the forest of Arundel, which is in his custody by order of the king, he cause Peter son of Herbert to have 5 roebucks as a gift of the king. Witness the king at Otford, on the 10th day of April. By Ralph son of Nicholas.
p261
1233.
 
De cervis datis.—Mandatum est P. de Rivall’ quod in foresta regis de Axiholt’ faciat habere Petro filio Hereberti tres cervos de dono regis. Teste ut supra [me ipso apud Heref’, xj. die Septembris, anno regni nostri xvij]. Per justiciarium.
This roughly translates as:
  Concerning stags given.—It is commanded to P[eter] de Rivaux that in the king's forest of Alice Holt he cause Peter son of Herbert to have three stags as a gift of the king. Witness as above [myself at Hereford, on the 11th day of September, in the 17th year of our reign]. By the Justiciar.
p313
1233.
  Die Lune proxima post festum Sancti Barnabe Apostoli apud Wigorniam coram rege anno etc. xvij., presentibus dominis Wintoniensi et Cycestrensi, S. de Sedgrave justiciario Anglie, comite Ricardo, W. comite Ablem’, Thoma comite War’, Philippo de Albiniaco, Petro de Malo Lacu, Pagano de Chaurces, Andrea de Chanceaus, P. de Rivall’ tunc thesaurario, Willelmo filio Warini, Hugone Dispensatore, Radulfo filio Nicholai, liberaverunt subscripti barones de Marchia obsides suos domino regi de fideli servicio, quousque regnum sit ita securatum quod firma pax sit in regno Anglie.
… Walterus de Bello Campo eodem modo liberavit Jacobum filium suum in obsidem pro eo. Et dominus rex tradidit eum Petro filio Hereberti.
This roughly translates as:
  On the Monday next after the feast of Saint Barnabas the Apostle [13 June] at Worcester before the king in the year etc. 17th, in the presence of the lords [bishops] of Winchester and Chichester, S[tephen] de Segrave justiciar of England, earl Richard, W. earl of Aumale, Thomas earl of Warwick, Philip d’Aubigny, Peter de Maulay, Pain de Chaworth, Andrew de Chanceaux, P. de Rivaux then treasurer, William fitz Warin, Hugh le Despenser, Ralph fitz Nicholas, the undersigned barons of the March delivered their hostages to the lord king for faithful service, until the realm be so secured that there be firm peace in the kingdom of England.
… Walter de Beauchamp in the same manner delivered James his son as a hostage for him. And the lord king handed him over to Peter fitz Herbert.
p478
1234.
  Pro Petro filio Herberti. De cervis datis.—Mandatum est Johanni de Venuz quod faciat habere Petro filio Herberti tres cervos in foresta de Wulvesmere, de dono regis. Teste rege apud Havering’, xx. die Julii.
This roughly translates as:
  For Peter son of Herbert. Concerning stags given.—It is commanded to John de Venuz that he cause Peter son of Herbert to have three stags in the forest of Woolmer, as a gift of the king. Witness the king at Havering, 20th day of July.

Calendar of the Close Rolls Henry III 1234-1237 p56 (1908)
1235.
 
Pro Petro filio Hereberti.—Mandatum est Johanni de Colemere quod tria dolia vini, que Petrus filius Hereberti emi fecit ad opus suum apud Suht’ et que arestari fecit, ut dicitur, eidem Petro sine dilatione deliberari faciat. Teste rege apud Gipewicum, viij. die Marcii. Per G. de Craucumb’.
This roughly translates as:
  For Peter son of Herbert.—It is commanded to John de Colemere that he cause to be delivered without delay to the same Peter three tuns [about 750 gallons] of wine, which Peter son of Herbert caused to be bought for his own use at Southampton and which he [John] caused to be arrested, as it is said. Witness the king at Ipswich, 8th day of March. By G. de Crowcombe.
p93
1235.
 Pro P. filio Herberti.—Mandatum est Johanni de Colemere quod de vinis, que arestata sunt apud Suht’ ad opus regis, permittat P. filium Hereberti habere v. dolia vini ad denarios suos. Teste ut supra. [rege apud Westmonasterium, xix. die Maii].
This roughly translates as:
  For P[eter]. son of Herbert.—It is commanded to John de Colemere that from the wines which are arrested at Southampton for the king’s use, he permit P[eter]. son of Herbert to have 5 tuns [about 1250 gallons] of wine for his own money. Witness as above [the king at Westminster, 19th day of May].
p204
1235.
 Pro abbate de Rading’.—Mandatum est majori et ballivis Oxonie quod de mesuagio illo in villa Oxonie quod Petrus filius Hereberti dedit abbati de Rading’, ut dicitur, et quod ceperunt in manum regis pro defectu muragii ad mesuagio illud pertinentis, eidem abbati plenam seisinam habere faciant, accepta ab eo prius bona securitate quod de predicto muragio regi satisfaciet tam de tempore preterito quam de futuro. Teste ut supra [rege apud Wudestok’, v. die Novembris].
This roughly translates as:
  For the abbot of Reading.—It is commanded to the mayor and bailiffs of Oxford that concerning that messuage in the town of Oxford which Peter son of Herbert gave to the abbot of Reading, as it is said, and which they took into the king’s hand for default of murage belonging to that messuage, they cause the same abbot to have full seisin, having first received good security from him that he will satisfy the king concerning the aforesaid murage both for past time and for future time. Witness as above [the king at Woodstock, 5th day of November].

An earlier gift from Peter, amongst others, to the monks at Alcester was confirmed by charter after his death when the monks planned development of their land.
Calendar of the Charter Rolls Henry III 1226-1257 p256 (1903)
1241. Feb. 8.
Woodstock.
  Grant to the abbot and monks of Alencestre of the following gifts:—
…  of the gift of Peter son of Herbert, all the holding which is of his fee, which the monks previously held, that is half the court of the said monks, half the mill which the monks made without their court, with half of the meadow, called Halemede, and half of the meadow, called Mulnham, which belong to the said half of the mill, for 10s.; and the demesne pigs of the said monks to be quit of pannage in the wood of the said Peter in Alencestre and without it; and from the wood sufficient timber for the use of the said monks and for the said mill, by view of the foresters of the said Peter and his heirs; and common of pasture for their beasts and flocks:

A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland vol 4 p465 (John Burke, 1838)
  PETER FITZ-HERBERT, Baron of Berstaple in Devonshire, the honor of which he obtained from King John, with fifteen knight’s fees, part of the lands of William de Braose, and he was made Governor of Pickering Castle in Yorkshire, and Sheriff of that county by the same moarch. This Peter was one of the barons named in Magna Charta, and by his signature fourth in rank amongst the barons. He m. first, Alice, dau. of Robert Fitz Roger, a great baron in Northumberland, Lord of Warkworth and Clavering, and sister of John, to whom EDWARD I. gave the surname of CLAVERING, Lord of Callaly in Northumberland. By this lady he had a son and heir, REGINALD FITZ PETER. He m. secondly Isabel, dau. and coheir of William de Braose, and widow of David Llewellin, Prince of Wales, and by the alliance acquired the lordships and castles of Blenlevenny and Talgarth in the county of Brecknock, with other possessions in Wales. He fortified his castle of Blenlevenny, and dying in 1235 was s. by his son,

The Complete Peerage vol 5 p465n (George Edward Cokayne, 1926)
  (d) … Herbert was s. and h. of Piers fitz Herbert (living 19 May 1235), by his 1st wife, Alice (marriage settlement, 28 Nov. 1203), da. of Robert fitz Roger, of Warkworth (Pipe Roll, 5 Joh., m. 5: Close Roll, 19 Hen. III, m. 11). Piers (who d. kal. Julii—seemingly a mistake for kal. Junii—was bur. at Reading—Annales de Theokesberia, p. 97) was 2nd but 1st surv. s. and h. of Herbert fitz Herbert (who d. before 18 July 1204), by Lucy, Lady of Blaen Llyfni and Bwlch y Dinas, da. and eventually coh. of Miles, Earl of Hereford.

The Complete Peerage vol 11 p94 (George Edward Cokayne, enlarged by Geoffrey H. White, 1949)
      ROS or ROOS OF HELMSLEY
… Piers FitzHerbert, lords of the Honour of Brecknock, whose castle was at Blaenllyfni. Piers FitzHerbert m. in 1203, his son Reynold not till 1249 (Curia Regis Rolls, vol. iii, p. 6; Close Rolls, 1247-51, p. 200).

Death: 1 June 1235
Annales de Theokesberia in Annales monastici vol 1 p97 (ed. Henry Richards Luard, 1864)
Kal. Julii obiit Petrus filius Hereberti, et sepultus est apud Radinges
This roughly translates as:
On the Kalends of July [1 July], Peter, son of Herbert, died and was buried at Reading.


Although the death of Peter is stated in Annales de Theokesberi to be 1 July, it is likely that this is an error for 1 June ("Kal. Junii" rather tham "Kal. Julii") as Peter is documented to have already died in a document related to his estate dated 6 June 1235.
Henry III Fine Rolls Project: C 60/34, 19 HENRY III (1234–1235)
1235.
306  6 June. Westminster. For Herbert, son of Peter fitz Herbert. The king has taken the homage of Herbert, son of Peter fitz Herbert, and heir of the same, for all lands and tenements which Peter fitz Herbert held in chief and which fall to Herbert by hereditary right. Order to the sheriff of Hampshire that, having accepted security from Herbert for rendering his relief to the king, he is to cause him to have full seisin of all lands and tenements of which Peter fitz Herbert died seised in his bailiwick and which fall to Herbert by hereditary right.
307  For Herbert, son of Peter fitz Herbert. Order in the same manner to the sheriffs of: Warwickshire. Worcestershire. Yorkshire. Shropshire. Berkshire. Wiltshire. Gloucestershire. Essex. Norfolk and Suffolk; [all of the above] with the exception that no mention is to be made of security, but that they are to cause the aforesaid Herbert to have full seisin of the lands and tenements etc. in the aforesaid form.

Burial: Reading Abbey, Reading, Berkshire, England

Sources:


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