Douglas Richardson, Royal Ancestry: A Study in Colonial and Medieval Families, 2nd edition, (Salt Lake City, Utah, 2013), volume IV, pages 564-566.

7. WILLIAM DE SAY, Knt. of Edmonton, Middlesex, West Greenwich, Birling, Burham, Cudham, Horsmonden, and Patrixbourne, Kent, Sawbridgeworth, Hertfordshire, Hartwell, Northamptonshire, Hamsey and Streat, Sussex, etc., Constable of Rochester Castle, son and heir by his father's 1st marriage, born before 1209 (of age in 1230). He married (1st) SIBYL ___, said to be the daughter of John Marshal, of Lenton, Nottinghamshire (or Linton, Kent). They had two sons, William, Knt., and John, and four daughters, Alice, Hawise, Agnes, and ___. He was in service beyond seas in 1230. He did homage to the king for his father's land 20 Sept. 1230. In 1235 he leased the manor of Greenwich, Kent to Katherine, widow of Henry de Edelmeton, for 13 years. In1237 he conceded the right of William, Earl Warenne to the fishery of Hamsey, Sussex and withdrew his claim to chase venison in certain of the earl's woods in Sussex. In 1237 he was allowed ten bucks from the king's forest of Essex to place in his park at Sawbridgeworth, Hertfordshire. The same year he confirmed the gift of his grandfather, Geoffrey de Say, to the Templars of the manor of Saddlescombe, Sussex. In 1238 he was going on a pilgrimage beyond seas. In 1242 he was going beyond seas with the king. In 1244 he acknowledged that land and a messuage in Edmonton, Middlesex belonged to Richard, Prior of Holy Trinity, London and his church, and granted the same an additional eight acres in Edmonton. His unnamed wife was living 14 August 1244, when she had three deer by gift of the king. In 1245 he was going to Wales on the king's business. The same year he was granted free warren in his manor of Sawbridgeworth, Hertfordshire. In 1246 he was granted a weekly market and yearly fair at manor of Great Linton, Cambridgeshire. In 1250 he was given two deer by gift of the king. In 1253 he was going with the king to Gascony. He joined the Barons against King Henry III. He was taken prisoner at the Siege of Rochester Castle, and his manors of Birling and Burham, Kent, were granted to Price Edward 12 May 1264. Sometime after 1264 he confirmed the grant which Robert de Makesey deceased made of land in Thurnham, Kent to the Prior and Convent of Cumbwell. He surrendered the county of Kent to Roger de Leybourne 8 August 1265. In 1267, the king by "grant of special grace," granted him the marriage of John le Marshal, grandson and heir of Aline le Marshal lately deceased. The king also granted him £100 yearly of land out of the first wards that fall in. In 1268 he had the king's letter to conduct Robert Peche who was coming to the king's court to treat of his peace. He married (2nd) MARY ___. SIR WILLIAM DE SAY died shortly before 12 Feb. 1271/2. His widow, Mary, married (2ndst wife) ROBERT DE UFFORD, Knt., of Ufford, Suffolk, and, in right of his 1st wife, of Long Stratton, Norfolk, Justiciar of Ireland, 1268-9, 1276-81, Justice of Chester before October 1276. They had one son, Robert, Knt. [1st Lord Ufford]. He was in Wales with Prince Edward in 1257, and going beyond the seas with him in 1261. He was present with Prince Edward at Boulogne-sur-Mer in Jan. 1263/4. He was granted the custody of the town and castle of Orford, Suffolk in 1275-6, and again for life 28 Dec. 1280. His wife, Mary, was living 10 August 1280, and was presumably dead before 1285, when her step-son, John de Say, was in possession of Long Stratton, Norfolk. Robert and his heirs were granted a weekly market and yearly fair at Bawdsey, Suffolk in 1283. He married (2nd) before 1286- 7 JOAN ___. They had two sons, Thomas, Knt. [see CLAVERING 5] and Edmund. In 1289 Richard de Benge granted a messuage in the hamlet of Benge (in Pettistree), Suffolk to Robert and his wife, Joan for 220 marks. In 1290 he was allowed to appoint attorneys, he being too old to ride, and, again in 1296, by reason of his debility. SIR ROBERT DE UFFORD died shortly before 9 Sept. 1298. His widow, Joan, was living 18 Nov. 1307.

Brydges Collins' Peerage of England 7 (1812): 16-39 (sub Twisleton, Lord Say and Sele) (wife Sibyl identified as "daughter of John Marshall, of Lenton"). Dugdale Monasticon Anglicanum 5 (1825): 89. Clutterbuck Hist. & Antiqs. of Hertford 3 (1827): 190-194 (Mandeville-Say ped.). Roberts Excerpta è rotulis finium in Turri Londinensi 1 (1835): 202. Top. & Gen. 2 (1853): 271-277 (Ufford ped.); 3 (1858): 1-4 (wife Sibyl identified as "daughter of John Marshall, of Linton, co. Kent."). Arch. Cantiana 5 (1863): 220-222 (charters of William de Say); 14 (1882): 169. Genealogist n.s. 5 (1889): 130 (seal of William de Say dated c.1264 — A shield of arms: Quarterly. Legend: S. Wilhelmi de Seye.). Hardy & Page Cal. to Feet of Fines for London & Middlesex 1 (1892): 28, 217. Birch Cat. Seals in the British Museum 3 (1894): 486 (seal of William de Say dated 1237 — A shield of arms: quarterly, SAY. On three fleury sprigs of foliage). Desc. Cat. Ancient Deeds 2 (1894): 25-38. Rye Cal. Feet of Fines for Suffolk (1900): 90, 94, 95, 102. Salzman Feet of Fines Rel. Sussex 1 (Sussex Rec. Soc. 2) (1902): 90-91. C.Ch.R. 1 (1903): 294, 340-341. Cal. IPM 1 (1904): 281-282. C.P.R. 1232-1247 (1906): 131, 222 , 297, 464. Rpt. on MSS in Various Colls. 4 (Hist. MSS Com. 55) (1907): 273. C.P.R. 1247-1258 (1908): 233, 259. Misc. Gen. et Heraldica 4th Ser. 3 (1910): 313-317. VCH Hertford 3 (1912): 332-347. C.P.R. 1266-1272 (1913): 167, 168, 186, 218, 623, 670. C.C.R. 1242-1247 (1916): 220, 267, 283, 403, 443. Book of Fees 1 (1920): 411, 416, 474-475, 570; 2 (1923): 898. C.C.R. 1247-1251 (1922): 381. Farrer Honors & Knights' Fees 3 (1925): 226, 313-322. Moor Knights of Edward I 4 (H.S.P. 83) (1931): 219 (biog. of William de Say). Taylor Recs. of the Barony & Honour of the Rape of Lewis (Sussex Rec. Soc. 44) (1939): 71-73. VCH Sussex 7 (1940): 114. C.P. 11 (1949): 470-473, 12(2) (1959): 148-149 (sub Ufford). Paget Baronage of England (1957) 485: 1-10 (sub Say). Sanders English Baronies (1960): 98. O'Connor Cal. Cartularies of John Pyel & Adam Fraunceys (Camden Soc. 5th Ser. 2) (1993): 221-223, 226, 231-232, 238-239, 240, 269, 297, 298 (charters of William son of Geoffrey de Day), 269, 288, 295, 298 (charters of William de Say), 240 (charter of William Son of Geoffrey de Say and Hawise de Clare), 82, 225-227, 232, 235-236, 269, 283-284, 431. VCH Northampton 5 (2002): 176-197. Cooper Village in Sussex (2006): 72. Online resource: http:// www.briantimms.net/rolls_of_arms/rolls/gloversB1.htm (Glover's Roll dated c.1252 — arms of William de Say: Quarterly or and gules).