The French expedition, which was led by the king's brother Edmund, earl of Lancaster, failed to recover Gascony, and came to an ignominious end. But Edward's own army achieved complete success in Scotland. Berwick was stormed, the Scottish army was routed at Dunbar (April 27), Edinburgh and Stirling were easily captured, and at last John Baliol, deserted by most of his adherents, surrendered at Brechin. Edward pursued his triumphant march as far as Aberdeen and Elgin, without meeting further resistance. He then summoned a parliament at Berwick, and announced to the assembled Scots that he had determined to depose King John, and to assume the crown himself. The ease with which he had subdued the realm misled him; he fancied that the slack resistance, which was mainly due to the incapacity and unpopularity of Baliol, implied the indifference of the Scots to the idea of annexation. The alacrity with which the greater part of the baronage flocked in to do him homage confirmed him in the mistaken notion. He appointed John, earl Warenne, lieutenant of the realm, with Hugh Cressingham, an English clerk, as treasurer, but left nearly all the minor offices in Scottish hands, and announced that Scottish law should be administered. He then returned to England, and began to make preparations for a great expedition to France in 1297. Disputes with the clergy and baronage. His plan was something more ambitious than a mere attempt to recover Bordeaux; succours were to go to Gascony, but he himself and the main army were to invade France from the north with the aid of the count of Flanders. Much money was, of course, needed for the double expedition, and in raising it Edward became involved in two desperate constitutional disputes. Though the barons and the commons voted a liberal grant at the parliament of Bury (Nov. 1296) the clergy would give nothing. This was owing to a bull--the celebrated _Clericis Laicos_, recently issued by the arrogant and contentious pope Boniface VIII., which forbade the clergy to submit to any taxation by secular princes. Robert Winchelsea, the archbishop of Canterbury, an enthusiastic exponent of clerical rights and grievances, declared himself in conscience bound to obey the pontiff, and persuaded the representatives of the Church in the parliament to refuse supplies. The king, indignant that an attempt should be made to exempt the vast ecclesiastical lands from taxation at a time of national crisis, sequestrated the estates of the see of Canterbury, and copied John's conduct in 1208 by outlawing the whole body of the clergy. Winchelsea in return excommunicated all those who refused to recognize the authority of the pope's bull.