Walter de Laci was one of the commanders whom William the Conqueror sent into Wales to subjugate the principality and, being victorious, acquired large possessions there, in addition to those already obtained as his portion of the spoil of Hastings. He was killed in April, 1084. Walter de Laci left three sons, Roger, Hugh, and Walter, a monk in the abbey of St. Peter's, at Gloucester. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd, London, 1883, p. 309, Lacy, Earls of Lincoln]