Austria rose again to a formidable strength. The
jealousy which France entertained of Sweden, prevented it from
permitting the total ruin of the Emperor, or allowing the Swedes to
obtain such a preponderance in Germany, as might have been destructive
to France herself. Accordingly, the French minister declined to take
advantage of the distresses of Austria; and the army of Turenne,
separating from that of Wrangel, retired to the frontiers of the
Netherlands. Wrangel, indeed, after moving from Suabia into Franconia,
taking Schweinfurt, and incorporating the imperial garrison of that
place with his own army, attempted to make his way into Bohemia, and
laid siege to Egra, the key of that kingdom. To relieve this fortress,
the Emperor put his last army in motion, and placed himself at its head.
But obliged to take a long circuit, in order to spare the lands of Von
Schlick, the president of the council of war, he protracted his march;
and on his arrival, Egra was already taken. Both armies were now in
sight of each other; and a decisive battle was momentarily expected, as
both were suffering from want, and the two camps were only separated
from each other by the space of the entrenchments. But the
Imperialists, although superior in numbers, contented themselves with
keeping close to the enemy, and harassing them by skirmishes, by
fatiguing marches and famine, until the negociations which had been
opened with Bavaria were brought to a bearing.

The neutrality of Bavaria, was a wound under which the Imperial court
writhed impatiently; and after in vain attempting to prevent it, Austria
now determined, if possible, to turn it to advantage. Several officers
of the Bavarian army had been offended by this step of their master,
which at once reduced them to inaction, and imposed a burdensome
restraint on their restless disposition. Even the brave John de Werth
was at the head of the malcontents, and encouraged by the Emperor, he
formed a plot to seduce the whole army from their allegiance to the
Elector, and lead it over to the Emperor. Ferdinand did not blush to
patronize this act of treachery against his father's most trusty ally.
He formally issued a proclamation to the Bavarian troops, in which he
recalled them to himself, reminded them that they were the troops of the
empire, which the Elector had merely commanded in name of the Emperor.
Fortunately for Maximilian, he detected the conspiracy in time enough to
anticipate and p