Mary (1662-94), daughter of James, Duke of York, heir to the English throne, then 15, is said to have wept for a day and a half when she was told she was to marry her cousin, William (1650-1702), son of William II of Orange (1626-50), Stadtholder of the Dutch republic, and Mary, eldest daughter of Charles I of England, who was eleven years older than her. In November 1677, on William's 27th birthd...