But this unfortunate step, instead of producing reunion with Rome, only called out new divisions in the Utraquist party. John Rokycana, the preacher at the Teyn Church, heard of these negotiations; and, though a strict and zealous Calixtine, he was a warm patriot, and by no means disposed to put either his faith or his nation at the feet of either Emperor or Pope. So in April, 1427, he preached an alarmist sermon warning the people that their interests were being betrayed. The people sprang to arms; Korybut was imprisoned; and Pr̆zibram and several of his allies were banished from Prague. But, to prove that the movement had a national rather than a doctrinal purpose, Rokycana and his friends passed a resolution in favour of at least a modified form of Transubstantiation. Thus Peter Payne was compelled to take his part with the Taborites, while a new division was formed among the Calixtines themselves. But in the meantime the aggressive policy of Procop had roused Martin V. to new energy; and since Germans, Hungarians, and Poles had each in turn failed him, he entrusted the management of a fourth crusade to an Englishman. This was the celebrated Cardinal Beaufort, who was now appointed legate for Bohemia, Hungary, and Germany, and under whose auspices a special Hussite tax was raised throughout the Empire. The Margrave of Brandenburg and the Archbishop of Trier took the leading part in the command of the army; and in July, 1427, the new crusaders entered Bohemia and began the siege of Kladrau. While they were almost hoping to capture the town, Procop suddenly advanced against them at the head of the united Utraquist army. Immediately the strange panic, which had become traditional at the approach of the Utraquists, seized upon the enemy; and they fled to the town of Tachov, which was at that time in their hands. Here Beaufort met them, reproached them with their cowardice, and persuaded them to prepare for battle. But no sooner did Procop’s army again appear in sight than the panic once more returned. Beaufort, enraged, seized the banner of the Empire and tore it to pieces in their presence. But the sense of fear was too strong, even for soldierly dignity; and at last the indignant Cardinal was swept away in the flight. Several new victories followed, though Pilsen (Plz̆en) still held out against the Utraquist armies. Beaufort demanded that a new anti-Hussite tax should be raised, and at the same time sent a command to the men of Pilsen that they should abstain from a proposed discussion with the Hussites on points of doctrine. The discussion took place notwithstanding; and Rokycana and Peter Payne were appointed to represent the Utraquist party.