 Complete the following phrase:  He became Chief Councillor to King Edward I, son and successor of Henry III. While the king was engaged in military conflicts with the Scots, Henry was appointed Protector of the Realm. Having taken part in the Conquest of Wales in 1282, Henry was granted the Lordship of Denbigh and built Denbigh Castle. In 1296 he went to France with Edmund, Earl of Lancaster Edmund Crouchback, the kings younger brother, on whose death in that year he succeeded as commander of the English forces in Gascony; he returned to England early in 1298. He was at the 