May 21st. 1471, witnessed the murder by stabbing of which king in the Tower of London?
Lieutenant of the Tower of London in 1424 during the reign of Henry VI. During the reign of Edward IV, Richard Haute (died 8 April 1487) was Lieutenant from 1471 to 1473. John de Vere, 13th Earl of Oxford was Constable in the reign of Henry VII, at which time Sir John Digby was his Lieutenant. According to some sources, in the reign of Henry VIII Sir Thomas Lovell (died 25 May 1524) served as Lieutenant from Michaelmas 1512; however according to other sources, he was Constable of the Tower. Among the prisoners of state in Lovell's custody was the Pretender to the Crown, Lambert Simnel.
Ravens of the Tower of London Dunraven (1841–1926). The second Earl of Dunraven had been a patron of the Druidic scholar, poet, and forger Iolo Morganwg, who convinced the family that their castle in Glamorgan had been the original residence of the raven-god Bran, actually an early king. The Earls may have thought of the ravens as avatars of Bran, and wished to assert a spiritual claim over the Tower. Geoffrey Parnell, the official Tower of London historian and a member of the Royal Armouries staff, also believes that the allegedly ancient history of captive ravens at the Tower is just a legend that was created