This project was peculiarly flattering to the Saxon Elector, to whom the idea of being dependent upon Sweden, or of longer submitting to the tyranny of the Emperor, was equally hateful. He could not, with indifference, see the control of German affairs wrested from him by a foreign prince; and incapable as he was of taking a principal part, his vanity would not condescend to act a subordinate one. He resolved, therefore, to draw every possible advantage from the progress of Gustavus, but to pursue, independently, his own separate plans. With this view, he consulted with the Elector of Brandenburg, who, from similar causes, was ready to act against the Emperor, but, at the same time, was jealous of Sweden. In a Diet at Torgau, having assured himself of the support of his Estates, he invited the Protestant States of the empire to a general convention, which took place at Leipzig, on the 6th February 1631. Brandenburg, Hesse Cassel, with several princes, counts, estates of the empire, and Protestant bishops were present, either personally or by deputy, at this assembly, which the chaplain to the Saxon Court, Dr. Hoe von Hohenegg, opened with a vehement discourse from the pulpit. The Emperor had, in vain, endeavoured to prevent this self-appointed convention, whose object was evidently to provide for its own defence, and which the presence of the Swedes in the empire, rendered more than usually alarming. Emboldened by the progress of Gustavus Adolphus, the assembled princes asserted their rights, and after a session of two months broke up, with adopting a resolution which placed the Emperor in no slight embarrassment. Its import was to demand of the Emperor, in a general address, the revocation of the Edict of Restitution, the withdrawal of his troops from their capitals and fortresses, the suspension of all existing proceedings, and the abolition of abuses; and, in the mean time, to raise an army of 40,000 men, to enable them to redress their own grievances, if the Emperor should still refuse satisfaction.