But the Wars of the Roses had one more phase to come. Warwick's name was still a power in the land, and his expulsion had been so sudden that he had not been given an opportunity of trying his strength. His old enmity for the house of Lancaster was completely swallowed up in his new grudge against the king that he had made. He opened negotiations with the exiled Queen Margaret, and offered to place his sword at her disposition for the purpose of overthrowing King Edward and restoring King Henry. The queen had much difficulty in forcing herself to come to terms with the man who had been the bane of her cause, but finally, was induced by Louis XI. to conclude a bargain. Warwick married his younger daughter to her son Edward, prince of Wales, as a pledge of his good faith, and swore allegiance to King Henry in the cathedral of Angers. He then set himself to stir up the Yorkshire adherents of the house of Neville to distract the attention of Edward IV. When the king had gone northward to attack them, the earl landed at Dartmouth (Sept. 1470) with a small force partly composed of Lancastrian exiles, partly of his own men. His appearance had the effect on which he had calculated. Devon rose in the Lancastrian interest; Kent, where the earl's name had always been popular, took arms a few days later; and London opened its gates. King Edward, hurrying south to oppose the invader, found his army melting away from his banner, and hastily took ship at Lynn and fled to Holland. He found a refuge with his brother-in-law and ally Charles the Bold, the great duke of Burgundy. Restoration of Henry VI. Edward returns to England. Battle of Barnet. Death of Warwick.