He [Payn FitzJohn] married Sibyl, daughter of Geoffrey TALBOT, by Agnes, probably daughter of Walter DE LACY. Payn gave Sibyl as dower land from his own inheritance. He was killed when pursuing Welsh marauders by a javelin which pierced his head, and so died s.p.m. 10 July 1137 and was buried in the chapter-house of Gloucester Abbey. Sibyl survived him (j). [Complete Peerage XII/2:270-1, (transcribed by Dave Utzinger)]
(j) Shortly after her husband's death the Bishop of Salisbury, as Chief Justiciar, ordered her to restore the property of her late husband removed by her since the confirmation of his possessions to their elder daughter, Cecily and her husband Roger, son of Miles de Gloucester, in particular the wheat, hay and wine. As Sybil de Lacy, for her soul and for the soul of her lord Pay FitzJohn, she confirmed a grant to her uncle, Walter de Lacy, Abbot of Gloucester.