In the meantime the growing bitterness of the Catholic nobles had been increased by a personal quarrel between George and Zdenek of Sternberg. Although George had been forced to rely upon this nobleman in his attempts to conciliate the Catholics, he soon found that Zdenek’s character was not deserving of confidence; and he was forced to refuse him a wardship, for which he applied, on the ground that he had abused his trust on a former occasion. This reproach roused Zdenek to still further opposition; and he induced the lords to found a League in defence of the Pope. The immediate object of Paul and the rebel lords was to find a king for Bohemia; and they fixed on Matthias of Hungary, who, though he owed much friendship and help to George, was easily attracted by the hope of a new kingdom. Many of the important towns of Bohemia fell away from the King, and joined the lords against him. The four great towns of Moravia formed a special League for the defence of the Catholic faith. Pilsen and Budweis, always inclined to the Catholic cause, speedily joined this League; and the town of Görlitz, the centre of a special district in Silesia, was hard pressed, on account of its loyalty to the king. George was so eager for peace that he consented to a meeting with the rebels at Prague, at which he defended himself from the various charges brought against him by the nobles; and he produced some of the charters from Carlstein to prove the legality of his actions. Sternberg refused to believe George’s assertion that he had shown them all the charters which concerned their rights; and he demanded that Carlstein and its contents should be handed over to himself and his friends, and that the charters should be submitted to the Emperor for confirmation. George indignantly refused these proposals, which apparently went beyond the wishes of many of the lords; but the Pope frightened the rebels into new opposition, by another Bull which placed Bohemia under an interdict.