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 "inforsyt it grettumly, for riche he was and full mychty" (enforced it greatly, for rich he was and full mighty). In 1360, Robert de Forsyth was appointed governor of Stirling Castle, an office he passed on to his son John and grandson William, who was governor in 1399. Under the early Stewart kings Robert II (reigned 1371–1390) and Robert III (reigned 1390–1406), the earliest surviving parts of the castle were built. Robert Stewart, Earl of Menteith, Regent of Scotland as brother of Robert III, undertook works on the north and south gates. The present north gate is built on these