territories
into the hands of the imperial commissioners, until his title to them
should be decided. On the other hand, Ferdinand had taken up arms at
the instigation of the Spaniards, to whom, as possessors of Milan, the
near neighbourhood of a vassal of France was peculiarly alarming, and
who welcomed this prospect of making, with the assistance of the
Emperor, additional conquests in Italy. In spite of all the exertions
of Pope Urban VIII. to avert a war in that country, Ferdinand marched a
German army across the Alps, and threw the Italian states into a general
consternation. His arms had been successful throughout Germany, and
exaggerated fears revived the olden apprehension of Austria's projects
of universal monarchy. All the horrors of the German war now spread
like a deluge over those favoured countries which the Po waters; Mantua
was taken by storm, and the surrounding districts given up to the
ravages of a lawless soldiery. The curse of Italy was thus added to the
maledictions upon the Emperor which resounded through Germany; and even
in the Roman Conclave, silent prayers were offered for the success of
the Protestant arms.

Alarmed by the universal hatred which this Italian campaign had drawn
upon him, and wearied out by the urgent remonstrances of the Electors,
who zealously supported the application of the French ambassador, the
Emperor promised the investiture to the new Duke of Mantua.

This important service on the part of Bavaria, of course, required an
equivalent from France. The adjustment of the treaty gave the envoys of
Richelieu, during their residence in Ratisbon, the desired opportunity
of entangling the Emperor in dangerous intrigues, of inflaming the
discontented princes of the League still more strongly against him, and
of turning to his disadvantage all the transactions of the Diet. For
this purpose Richelieu had chosen an admirable instrument in Father
Joseph, a Capuchin friar, who accompanied the ambassadors without
exciting the least suspicion. One of his principal instructions was
assiduously to bring about the dismissal of Wallenstein. With the
general who had led it to victory, the army of Austria would lose its
principal strength; many armies could not compensate for the loss of
this individual. It would therefore be a masterstroke of policy, at the
very moment when a victorious monarch, the absolute master of his
operations, was arming against the Emperor, to remove from the head of