Wars of the Roses the Hundred Years' War, unfolding the structural problems of feudalism, combined with the mental infirmity and weak rule of King Henry VI which revived interest in Richard of York's claim to the throne. Historians disagree on which of these factors to identify as the main reason for the wars. With the Duke of York's death, the claim transferred to his heir, Edward, who later became the first Yorkist king of England, as Edward IV. He reigned from 1461, interrupted by a Lancastrian uprising and reinstallment of Henry VI in 1470 to 1471, until his sudden death in 1483. His son
Gervase Clifton (died 1471) May 1471. Clifton married twice, leaving no sons, only two daughters and co-heiresses by his first wife, Isabel Herbert (died c. November 1457), widow of William Scott (died 5 February 1434) of Brabourne, Kent, and daughter of Vincent Herbert ("alias" Finche) of Netherfield, Sussex by his wife Isabel Cralle, daughter and coheiress of Robert Cralle. Their two daughters were: Clifton's second marriage, before 20 March 1463, was to Maud Stanhope (died 30 August 1497), widow firstly of Robert Willoughby, 6th Baron Willoughby de Eresby (died 1452), and secondly of Sir Thomas Neville (died 1460), second son of Richard Neville, 5th