The death of his eldest son Edward, which happened at this time, grieved him greatly; he became worse, and his surgeon advised him to return to England. He left Aquitaine in charge of Lancaster, landed at Southampton early in January 1371, met his father at Windsor, and put a stop to a treaty the king had made the previous month with Charles of Navarre, for he would not consent to the cession of territory that Charles demanded, and then went to his manor of Berkhamsted, ruined alike in health and in fortune.