What the Earl really counted on was not so much Lancastrian aid as Yorkist treason. Edward reckoned on the loyalty of Warwick's brothers, the Archbishop of York and Lord Montagu. The last indeed he "loved," and Montagu's firm allegiance during his brother's defection seemed to justify his confidence in him. But in his desire to redress some of the wrongs of the civil war Edward had utterly estranged the Nevilles. In 1469 he released Henry Percy from the Tower, and restored to him the title and estates of his father, the attainted Earl of Northumberland. Montagu had possessed both as his share of the Yorkist spoil, and though Edward made him a marquis in amends he had ever since nursed plans of revenge. From after events it is clear that he had already pledged himself to betray the king. But his treachery was veiled with consummate art, and in spite of repeated warnings from Burgundy Edward remained unconcerned at the threats of invasion. Of the Yorkist party he held himself secure since Warwick's desertion of their cause; of the Lancastrians he had little fear; and the powerful fleet of Duke Charles prisoned the Earl's ships in the Norman harbours. Fortune however was with his foes. A rising called Edward to the north in September, and while he was engaged in its suppression a storm swept the Burgundian ships from the Channel. Warwick seized the opportunity to cross the sea. On the thirteenth of September he landed with Clarence at Dartmouth, and with an army which grew at every step pushed rapidly northward to meet the king. Taken as he was by surprise, Edward felt little dread of the conflict. He relied on the secret promises of Clarence and on the repeated oaths of the two Nevilles, and called on Charles of Burgundy to cut off Warwick's retreat by sea after the victory on which he counted. But the Earl's army no sooner drew near than cries of "Long live King Henry!" from Montagu's camp announced his treason. Panic spread through the royal forces; and in the rout that followed Edward could only fly to the shore, and embarking some eight hundred men who still clung to him in a few trading vessels which he found there set sail for the coast of Holland. [Sidenote: Warwick's triumph]