|WILLIAM de Saye Lord of West Greenwich|
|'Inquisitions Post Mortem, Henry III, File 42', in Calendar of Inquisitions Post Mortem: Volume 1, Henry III, ed. J E E S Sharp (London, 1904), pp. 273-287 via British History Online or Internet Archive.|
|Writ, 12 Feb. 56 Hen. III.
William de Say, his son, age variously stated as 18 on the feast of St. Edmund the King last, and 19 on the same feast, is his heir.
Hertford. Exent, Saturday after St. Matthias (?) 56 [Hen. III.].
Sabritteswrth manor (extent given of the part which was of William de Say), tenure unspecified.