Adolphus, supported by the Protestant states, would be invincible; a
consideration which already filled the Emperor with alarm. The example
of Saxony would probably influence others, and the Emperor's fate seemed
now in a manner to depend upon the Elector's decision. The artful
favourite impressed upon his master this idea of his own importance, and
advised him to terrify the Emperor, by threatening an alliance with
Sweden, and thus to extort from his fears, what he had sought in vain
from his gratitude. The favourite, however, was far from wishing him
actually to enter into the Swedish alliance, but, by holding aloof from
both parties, to maintain his own importance and independence.
Accordingly, he laid before him a plan, which only wanted a more able
hand to carry it into execution, and recommended him, by heading the
Protestant party, to erect a third power in Germany, and thereby
maintain the balance between Sweden and Austria.

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 right