The pardon of Northumberland had left him still a foe; the Earl of Nottingham was son of Henry's opponent, the banished Duke of Norfolk; Scrope, Archbishop of York, was brother of Richard's counsellor, the Earl of Wiltshire, who had been beheaded on the surrender of Bristol.

Their rising in May might have proved a serious danger had not the treachery of Ralph Neville, the Earl of Westmoreland, who still remained steady to the Lancastrian cause, secured the arrest of some of its leaders.

Scrope and Lord Nottingham were beheaded, while Northumberland and his partizan Lord Bardolf fled into Scotland and from thence to Wales.

Succours from France stirred the king to a renewed attack on Glyndwr in November; but with the same ill-success.

Storms and want of food wrecked the English army and forced it to retreat; a year of rest raised Glyndwr to new strength; and when the long-promised body of eight thousand Frenchmen joined him in 1407 he ventured even to cross the border and to threaten Worcester.