nigel fossard's son robert died c.1135, robert's son william i d. c. 1170, leaving a son william ii who died in 1195 leaving an heiress joan, who brought the barony and castle to her husband robert de turnham (d.1211). their only surviving child and heiress was isabel de turnham who brought the barony and castle to peter de mauley (or maulay) (d.1241) to whom she had been granted in marriage by king john on the escheatment of the barony. de mauley was a native of poitou, whose marriage to this wealthy heiress is said to have been his reward for having murdered in 1203 prince arthur, the son of john's elder brother who threatened his succession to the throne. he was governor of corfe castle in dorset where he acted as jailer of eleanor, arthur's sister. peter i's heir was peter ii de mauley (1226–1279), who married joan de brus (d.1243), one of five sisters of peter iii de brus (d.1272), feudal baron of skelton, yorkshire, who was his brother-in-law, having married hilary de mauley, peter ii's sister. in the time of peter ii the barony was held by knight service of supplying two knights in time of war in the king's presence for 40 days per annum. peter ii's heir was peter iii de mauley (d.1308), who married nicole de ghent (d. before 1302), sister and in her issue co-heir (in a 1/3rd share) to gilbert v de ghent (d.1298), feudal baron of folkingham, lincolnshire. peter iii was summoned to parliament by writ dated 23 june 1296, creating him baron mauley. peter iii's seal can be seen as one of 72 appended to the barons' letter, 1301 to the pope" sealed at the parliament of lincoln in january 1301, and shows him on the reverse in the usual pose for early seals holding sword and shield astride his galloping war-horse, with the tails of his surcoat swept back by the wind. his arms within a heater-shaped escutcheon show a bend with a field diapered with scroll-work, which are blazoned as borne by him on the falkirk roll (1298) as: "or, a bend sable". his heir was peter iv de mauley (d.1348). camden states that the first peter was succeeded by 7 others bearing his name.