At this period the duke, in consequence of pressing letters from the emperor, set out for Vienna in order to concert the operations for the ensuing campaign, and other measures of importance, in which the concerns of the allies were interested. In his way he was magnificently entertained by the elector Palatine, and him of Triers, and complimented by the magistracy of Frankfort, where he conferred with prince Louis of Baden. On the twelfth of November he arrived at Vienna, where he was treated with the highest marks of distinction and cordial friendship by their imperial majesties. His son-in-law, the earl of Sunderland, had been sent thither as envoy-extraordinary; and now they conferred together with the emperor and his ministers. They resolved to maintain the war with redoubled vigour. The treaties were renewed, and provision made for the security of the duke of Savoy. The emperor, in consideration of the duke’s signal service to the house of Austria, presented him with a grant of the lordship of Mindel-heim in Suabia, which was now erected into a principality of the Roman empire. In his return with the earl of Sunderland he visited the courts of Berlin and Hanover, where he was received with that extraordinary respect which was due to his character; and arrived at the Hague on the fourteenth day of December. There he settled the operations of the next campaign with the states-general, who consented to join England in maintaining an additional body of ten thousand men reinforcement to the army of prince Eugene in Italy. While the allies were engaged in the siege of Santvliet, the elector of Bavaria sent a detachment, under the command of don Marcello de Grimaldi, to invest Diest, the garrison of which were made prisoners of war.