Henry Stuart, Lord Darnley not together in early 1545 and a letter of March 1566, from Mary Queen of Scots, indicates Darnley was then nineteen years old. Therefore the date 1546 would seem probable. A descendant of both James II of Scotland and Henry VII of England, Henry Stuart, Lord Darnley, was heir to two royal houses, the House of Stuart and the House of Tudor, thus he had claim to both the Scottish and English thrones, a claim that may have cost him his life. In 1545, his father, Matthew Stewart, 4th Earl of Lennox was found guilty of treason in Scotland for
Henry Stuart, Lord Darnley private secretary, David Rizzio, was stabbed 56 times on 9 March 1566 by Darnley and his confederates, Protestant Scottish nobles, in the presence of the seven-months-pregnant queen in her dining room. According to English diplomats Thomas Randolph and the Earl of Bedford, the murder of Rizzio (who was rumoured to be the father of Mary's unborn child) was part of Darnley's bid to force Mary to cede the Crown Matrimonial. Darnley also made a bargain with his allies to advance his claim to the Crown Matrimonial in the Parliament of Scotland in return for restoring their lands and titles. When