The congress had opened at Aix-la-Chapelle early in the spring, but it did not begin its sittings till the 11th of March, 1748, Sandwich being sent thither as our Plenipotentiary. The campaign, however, opened simultaneously, and, could Cumberland and the king have managed it, war would soon have overturned the hopes of peace; but circumstances were too much for them. The Prince of Nassau, ambitious as he was of military renown, failed to bring into the field his Dutch levies; the thirty thousand Prussians, as Pelham had expected, did not appear. The Dutch, so far from furnishing the sums they had engaged for, sent to London to raise the loan of a million sterling; but London itself had ceased to be a money-lending place. The war had drained the resources even of the British capital. To complete the deadlock, Marshal Saxe advanced into the field, and showed to the world that, though Cumberland might beat an army of famine-exhausted Highlanders, he was no match for him. He completely out-generalled him, made false demonstrations against Breda, where the Allied army lay, and then suddenly concentrated his forces before Maestricht, which, it was evident, must soon fall into his hands. Maestricht secured, the highway into Holland was open. The king and his war cabinet were now compelled to sue to France for the peace which was so freely offered the year before. Newcastle wrote to Sandwich in April, that the impossibility of arresting the progress of the French army, the discordant pretensions of the Allies, and their gross neglect of their engagements, rendered it absolutely necessary to make peace. Sandwich was to communicate this necessity to the Plenipotentiaries of the Allies, and if they declined to assent to it, to sign the preliminaries without them. The Ministers of the Allies still refused to join; it suited them very well to receive vast subsidies to fight their own battles, and yet to leave England to fight them. On the other hand, Count St. Severin, the Plenipotentiary of France, now felt his vantage-ground, and offered far worse terms than before, and, to force their acceptance, threatened that if they were not agreed to without delay, the French would leave the fortifications of Ypres, Namur, and Bergen-op-Zoom, and march directly into Holland. The treaty was signed by England, France, and Holland on the 18th of April. The general conditions were a mutual restoration of conquests. All the nations were placed very much _in statu quo_, except that Prussia had got Silesia, and Sardinia had lost Placentia and Finale. As for England, she firmly established her maritime supremacy, which from that date has remained unchallenged. The Young Pretender was compelled to leave France, and thenceforward ceased to be of any political importance.