Buckingham had aided Richard on terms of being given the title of Earl of Hereford and its income, but balks at the idea of murdering the two princes. Richard then asks a minor knight, Sir James Tyrrel (Patrick Troughton), eager for advancement, to have young Edward and the Duke of York killed in the Tower of London. Buckingham, having requested his earldom at Richard's coronation, fears for his life when Richard (angry at Buckingham for not killing the princes) shouts "I am not in the giving vein today!" Buckingham then joins the opposition against Richard's rule.