A writ after the death of "Beatrice late the wife of Peter Corbet of Caus", dated "30 Aug 21 Edw III", names "Thomas Corbet…from whom issued Peter, Alice the elder daughter and Emma the younger", that "Peter" inherited, and after his death "Peter his son" who married "the aforesaid Beatrice" who devised the manor of Bynweston to "one John Corbet". Inquisitions dated "Tuesday after St Luke 2 Edw I" following the death of "Thomas Corbeth" name “Peter his son is his next heir”.
He was summoned to Parliament in 1295 whereby he is held to have become Lord Corbet. Inquisitions dated "24 Oct 27 Edw I", following the death of "Hawis late the wife of Reginald de Valle Torta", name “Peter Corbet aged 30 and more and Henry de la Pomerey aged 32 are next heirs of the inheritance of the said Reginald”. The age of Piers Corbet in this document is puzzling: either it is an error or the document refers to Piers [II], in which case Piers [I] would have resigned the inheritance in favour of his son. Inquisitions following a writ dated "10 Aug 28 Edw I", after the death of "Peter Corbet of Caus", name “Peter his son, aged 30 and more (is his next heir)”, name “Peter his son and heir and Beatrice his wife”, and also record that the deceased “had a firstborn son named Thomas, who by his father’s will espoused Joan daughter of Alan Plukenet and died without heir himself” and gave dower to her “at the feast of St. Martin 23 Edw I” after her husband died. 1
25 Dec 1274, Woodstock
To John de London[ia], escheator this side Trent. Order to cause Peter Corbet, son and heir of Thomas Corbet, to have seisin of the manor of Silferton, whereof his father was seised in his demesne as of fee at his death, as the king lately took Peter's homage for the lands that his father held in chief, and ordered the escheator to cause him to have seisin thereof upon his finding security for payment of his relief, and Peter has not yet had seisin of the aforesaid manor, as the king learns.
Calendar of Close Rolls, 3 Edw. I, p. 141
Inquisition Post Mortem
600. PETER CORBET of Caus.
Writ, Gerton in Galloway (Galwythya), 10 Aug. 28 Edw. I. 
SALOP. Inq. Sunday the eve of the Decollation of St. John the Baptist, 28 Edw. I.
Caurs. The castle and manor (extent given with names of tenants), including a preserve, a wood of 60a. called ’le Park,’ and a free hay called the Hay of Caus, containing 200a.
Worthin. The manor (extent given with names of tenants), including ‘le Oldemulne‘ and ‘le Newemulne.’
SALOP. Inq. the day of the Decollation of St. John the Baptist, 28 Edw. I.
Munsturley. The manor (extent given with names of tenants).
Wontenouere. The manor (extent given with names of tenants).
Shelve. A water-mill, 21s. 4d. rent from 16 tenants at will, and 3s. 6d. from 7 cottars, pleas &c.
SALOP. Inq. the morrow of the Decollation of St. John the Baptist [28 Edw. I].
Forton. A messuage, 3 carucates of land containing 300a., 24a. meadow, a water-mill, and 12a. wood.
Lower Gorthor. 21s. 5 1/2d. assised rents of Welsh free tenants (extent given with names of tenants), and pleas &c. of court.
Baghaltreff. 4s. 9 1/2d. similiar rents.
Upper Gorthor. 24s. 8 1/2d. similiar rents, and pleas &c. of court.
Steyfrestones. The forest containing 10a.
ALL the above manors, lands &c. in Salop held of the king in chief by barony, by service of 5 knights’ fees.
He held no other lands on this side Trent.
Peter his son, aged 30 and more (is his next heir).
SALOP. [Inq. (undated)].
Yokelthull. Peter son of Thomas Corbet, who held the manor of Yokelthull (extent given), including a wood called ‘le Park,’ which is a member of Caus, of the king in chief by barony, gave the manor, at the feast of the Invention of the Holy Cross, 26 Edw. I, to Peter his son and heir and Beatrice his wife and the heirs of their bodies, to hold without doing any service, without the king’s licence, and immediately after forty days retook (?) the manor into his hand by the will of the said Peter his son, and so died seised.
Binneweston. The aforesaid Peter son of Thomas, who held the manor (extent given), which is a member of Caus, in the same manner of the king, had a firstborn son named Thomas, who by his father’s will espoused Joan daughter of Alan Plukenet and died without heir of himself; after whose death at the feast of St. Martin, 23 Edw. I, the said Peter, without the king’s licence, gave the manor to the said Joan as dower, to hold of the said Peter for her life without doing any service, with reversion to the said Peter and his heirs.
C. Edw. I. File 94. (6.) 2