Richard was not personally responsible for the death of his wife's first husband, Edward of Westminster (the son of Henry VI), nor that of her father, the Earl of Warwick (and in "Henry VI, Part 3" Richard is not portrayed as being responsible for Warwick's death). Edward of Westminster and Warwick were killed in the battles of Tewkesbury and Barnet, respectively. Richard, then eighteen, took part in both battles, but no contemporary records indicate him as being involved directly in either death. Shakespeare's sources do not identify Richard as being involved in the death of Henry VI, who was probably murdered on the orders of Edward IV. Richard and his wife, Anne Neville, had known each other for a long time before they married, having spent much of their childhood in the same household. Henry VI's widow, Queen Margaret, would not have been seen at court in the period covered by this play; she became Edward IV's prisoner and returned to France in 1475. Richard's elder brother, Clarence (George, Duke of Clarence), was executed by Edward IV for treason in 1478, when Richard was in the North of England, where he continued to live until Edward IV died five years later.