Earl of Salisbury later by Richard Neville "the Kingmaker", upon whose death the title went into abeyance because multiple individuals were entitled to inherit it. Then, in 1472, it was granted to George, Duke of Clarence, who was married to Warwick's eldest daughter. When the Duke of Clarence was executed in 1478 for treason (supposedly by being drowned in a vat of Malmsey wine), the title was forfeit. It was then granted to Edward of Middleham (who was his nephew via the Duke's brother Richard), who died in 1484 at the age of 11. It was restored to two of George of Clarence's
George Plantagenet, 1st Duke of Clarence in the play and his ghost later appears to Gloucester, then already Richard III, and Henry Tudor, the future Henry VII of England, before the Battle of Bosworth Field, cursing his brother and encouraging Henry. Clarence married his wife Isabel Neville in Calais, at that time controlled by England, on 11 July 1469. Together they had four children: George Plantagenet, 1st Duke of Clarence George Plantagenet, Duke of Clarence (21 October 144918 February 1478), KG, was the third surviving son of Richard Plantagenet, 3rd Duke of York, and Cecily Neville, and the brother of English Kings Edward IV and Richard