GALLATIN and Bayard, having sailed from the Delaware May 9, arrived at St. Petersburg July 21, only to find that during the six months since the Czar offered to mediate, Russia had advanced rapidly in every direction except that of the proposed mediation. Napoleon after being driven from Russia in December, 1812, passed the winter in Paris organizing a new army of three hundred thousand men on the Elbe, between Dresden and Magdeburg, while a second army of more than one hundred thousand was to hold Hamburg and Bremen. Russia could not prevent Napoleon from reconstructing a force almost as powerful as that with which he had marched to Moscow, for the Russian army had suffered very severely and was unfit for active service; but the Czar succeeded in revolutionizing Prussia, and in forcing the French to retire from the Vistula to the Elbe, while he gained a reinforcement of more than one hundred thousand men from the fresh and vigorous Prussian army. Even with that assistance the Czar could not cope with Napoleon, who, leaving Paris April 17, during the month of May fought furious battles at Lützen and Bautzen, which forced the allied Russian and Prussian armies back from the Elbe to the Oder. At that point Austria interfered so energetically as to oblige Napoleon to accept an armistice for the purpose of collecting new forces. During the armistice the Czar stationed himself at Gitschin in Bohemia, nine hundred miles from St. Petersburg, and about the same distance from London by the path that couriers were obliged to take. When Gallatin and Bayard reached St. Petersburg, July 21, the armistice, which had been prolonged until August 10, was about to expire, and the Czar could not be anxious to decide subordinate questions until the issue of the coming campaign should be known. Meanwhile the government of England had in May, with many friendly expressions, declined the Russian mediation.[441] Castlereagh probably hoped that this quiet notification to Lieven, the Russian envoy in London, would end the matter; but toward the month of July news reached London that the American commissioners, Gallatin and Bayard, had arrived at Gothenburg on their way to Russia, and Castlereagh then saw that he must be more explicit in his refusal. Accordingly he took measures for making the matter clear not only to the Russian government but also to the American commissioners. With the Russian government he was obliged by the nature of their common relations to communicate officially, and he wrote instructions to Lord Cathcart, dated July 5, directing communication to be made.