1George Edward Cokayne, Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Vol. 6 N to R, p. 401 (1895).
"V. 1352. 5. THOMAS (DE ROS), LORD ROS, br. and h., aged 14, at his brother's death in 1352. He was sum. to Parl., 24 Aug. (1362), 26 Ed. III., and 3 March (1383/4), 7 Ric. II.(e) He served in the French wars and obtained licence to go to the Holy Land. He m. in 1368, Margaret, DOW. COUNTESS OF DESMOND [I.[, da. of Ralph 9STAFFORD), EARL OF STAFFORD, by Margaret, da. and h. of Hugh (AUDLEY), EARL OF GLOUCESTER. He d. 8 June 1383, at Uffington, co. Lincoln, and was bur. in Rievaulx Abbey. Inq. post mortem (1384), 7 Ric. II. Will pr. at Lincoln, 19 Aug. 1384. His widow m. (as her third husband), Sir Richard BURLEY, K.G., who d. s.p. 23 May 1387, in Galicia, and was bur. in St. Paul's Cathedral, London. She d. 14 April 1415. Will dat. 25 June 1414 (directing her burial to be at Wartre), pr. 16 May 1415.".