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 time, with Gustavus, for an expedition against Vienna. As Duke of Mecklenburg he was an independent potentate, and he regarded himself as released from the allegiance of a subject. Before breaking off his negotiation with the Swede, he beheld his enemies at his feet. Wallenstein was able to dictate his terms, and to make himself secure against a second dismissal. His army was his own. He meant to obey while obedience suited his purpose, and to act for himself when it did not. Unlike Tilly, the aims of his life were political, not ecclesiastical. With so many reasons for distrust on one side and resentment on the other, a catastrophe could hardly be averted. With Saxony and the Saxon general Arnim, who had been one of his colonels, he kept up an understanding; and they evacuated Bohemia, which they had occupied after Breitenfeld.

Wallenstein's new battalions came into line, and he took up a strong fortified position near Nuremberg, with 60,000 men; while Gustavus stood at the foot of the Alps, and his adherents wondered whether he meant to cross them, and to attack Catholicism in its centre. When the king knew that the imperial army had risen again, and threatened his communications on the road through Franconia, he hurried to measure swords with Wallenstein. He was heavily repulsed, and moved once more towards the Danube, expecting to be followed. He was still the dominating force in Germany, supported, if not trusted, by Lutheran and Calvinist alike. At that moment Gustavus committed a fatal mistake. If, as Oxenstiern advised, he had descended the valley of the Danube into the hereditary provinces, the Imperialists must have pursued him at a disadvantage, and could not have reached Vienna before him. But Gustavus turned westward, towards Suabia, and Wallenstein disregarded his movements. Gathering his forces, he threw them upon Saxony, which had refused to give up the Swedish alliance. The King of Sweden hastened to the rescue, while the Saxon army stood apart, waiting the event. Pappenheim had been detached, and the Swedes, in