Edward of Norwich, 2nd Duke of York by a French chronicler to have betrayed to the king a conspiracy at the end of 1399 by a group of Richard II's former favourites who planned to murder Henry IV and his sons at a jousting tournament at Windsor Castle on 6 January 1400. But according to James Tait, contemporary English sources that describe the conspiracy make no mention of Edward, and his role in it is open to question. In October 1400, the king made Edward Keeper of North Wales, and on 5 July 1401, his lieutenant in Aquitaine. On 1 August 1402, Edward's father died, and he
Stirling Castle English commanders William FitzWarin and Marmaduke Thweng retreated into the castle. However, they were quickly starved into surrender by the Scots. Next summer, the castle changed hands again, being abandoned by the Scots after the English victory at Falkirk. Edward strengthened the castle, but it was besieged in 1299 by forces including Robert Bruce. King Edward failed to relieve the garrison, who were forced to surrender. By 1303, the English again held the upper hand, and Stirling was the last remaining castle in Scottish hands. Edward's army arrived in April 1304, with at least 17 siege engines. The Scots, under