But the triumph, rapid and complete as it was, had more than exhausted the aids granted by the Parliament. The treasury was utterly drained. The struggle indeed widened as every month went on; the costly fight with the French in Gascony called for supplies, while Edward was planning a yet costlier attack on northern France with the aid of Flanders. Need drove him on his return from Scotland in 1297 to measures of tyrannical extortion which seemed to recall the times of John. His first blow fell on the Church. At the close of 1294 he had already demanded half their annual income from the clergy, and so terrible was his wrath at their resistance that the Dean of St. Paul's, who stood forth to remonstrate, dropped dead of sheer terror at his feet. "If any oppose the King's demand," said a royal envoy in the midst of the Convocation, "let him stand up that he may be noted as an enemy to the King's peace." The outraged Churchmen fell back on an untenable plea that their aid was due solely to Rome, and alleged the bull of "Clericis Laicos," issued by Boniface the Eighth at this moment, a bull which forbade the clergy to pay secular taxes from their ecclesiastical revenues, as a ground for refusing to comply with further taxation. In 1297 Archbishop Winchelsey refused on the ground of this bull to make any grant, and Edward met his refusal by a general outlawry of the whole order. The King's Courts were closed, and all justice denied to those who refused the king aid. By their actual plea the clergy had put themselves formally in the wrong, and the outlawry soon forced them to submission; but their aid did little to recruit the exhausted treasury. The pressure of the war steadily increased, and far wider measures of arbitrary taxation were needful to equip an expedition which Edward prepared to lead in person to Flanders. The country gentlemen were compelled to take up knighthood or to compound for exemption from the burthensome honour, and forced contributions of cattle and corn were demanded from the counties. Edward no doubt purposed to pay honestly for these supplies, but his exactions from the merchant class rested on a deliberate theory of his royal rights. He looked on the customs as levied absolutely at his pleasure, and the export duty on wool--now the staple produce of the country--was raised to six times its former amount. Although he infringed no positive provision of charter or statute in his action, it was plain that his course really undid all that had been gained by the Barons' war. But the blow had no sooner been struck than Edward found stout resistance within his realm. The barons drew together and called a meeting for the redress of their grievances. The two greatest of the English nobles, Humfrey de Bohun, Earl of Hereford, and Roger Bigod, Earl of Norfolk, placed themselves at the head of the opposition. The first was Constable, the second Earl Marshal, and Edward bade them lead a force to Gascony as