Such an alliance had now become Warwick's settled policy. In it lay the certainty of peace at home as abroad, the assurance of security to the throne which he had built up. While Henry was sheltered in Scotland where French influence was supreme, and while Margaret of Anjou could look for aid from France, the house of York could hope for no cessation of the civil war. A union between France, Burgundy, and England left the partizans of Lancaster without hope. When Lewis therefore summoned him to an interview on the Somme, Warwick, though unable to quit England in face of the dangers which still threatened from the north, promised to send his brother the Chancellor to conduct a negotiation. Whether the mission took place or no, the questions not only of peace with France but of a marriage between Edward and one of the French king's kinswomen were discussed in the English Council as early as the spring of 1464, for in the May of that year a Burgundian agent announced to the Croys that an English embassy would be despatched to St. Omer on the coming St. John's day to confer with Lewis and Duke Philip on the peace and the marriage-treaty. But at this very moment Warwick, followed by the king, was hurrying to meet a new rising which Margaret had brought about by a landing in the north. On 15th May the Lancastrians were finally routed by Lord Montagu in the battle of Hexham, and the queen and her child driven over the Scotch border. The defeat of this rising seemed at last to bring the miserable war to a close. The victory of Hexham, with the capture of Henry that followed a year later, successes which were accepted by foreign powers as a final settlement of the civil strife, left Edward's hands free as they had never been free before, while his good fortune quickened the anxiety of Lewis, who felt every day the toils of the great confederacy of the French princes closing more tightly round him. But Margaret was still in his hands, and Warwick remained firm in his policy of alliance. At Michaelmas the Earl prepared to cross the sea for the meeting at St. Omer. [Sidenote: Edward's Marriage]