Napoleon was on the point of leaving Dresden, when Frederic William, King of Prussia, arrived there. A treaty, signed February 24, 1812, bound this prince to furnish for the next campaign twenty thousand men, under a Prussian general, but bound to obey the commander of the French army corps to which they should be assigned. Austria, by a treaty concluded March 14, had promised to furnish a corps of thirty thousand men, commanded by an Austrian general, under Napoleon's orders. Prussia especially suffered under such a condition of things, and the memory of Jena had never been keener or more distressing. The occupation of Spandau and Pillau by the French, and the ravages inflicted on the kingdom by the troops marching towards Russia, had much disturbed and grieved Frederic William, who imagined that Napoleon meant to dethrone him. Being very anxious to have early information about the lot that awaited him, he sent to Dresden M. von Hatzfeld, the great Prussian nobleman whom Napoleon had wanted to have shot in 1806, and to whom he had later become much attached, which shows, as Thiers has said, that it is well to think twice before having any one shot. Through M. von Hatzfeld the King of Prussia requested an interview with the Emperor in Berlin. The Emperor made answer that Berlin was not on his road, that he could not go there, but that he would be glad to see the King in Dresden. Frederic William regarded the invitation as a command, and set out forthwith. He reached the capital May 26, accompanied by Baron von Hardenberg and Count von Goltz, Ministers of State, Prince von Witgenstein, High Chamberlain, M. von Jagou, First Equerry, Baron von Krumsmarck, Prussian Minister to Paris, and was joined the next day, the 27th, by the Crown Prince. Father and son were very well received. Napoleon consented to credit Prussia with the supplies taken by the troops on their march, and promised to enlarge the boundaries of the kingdom if the war with Russia should be successful. For his part, the King proposed to the Emperor to take the Crown Prince with him as aide-de-camp, and introduced him to the other aides, asking them to treat their new comrade kindly. According to the Memoirs of the Baron de Bausset, who was present at the Dresden interview, "Everything which has been written about the coldness of the King of Prussia's reception is false. He was welcomed, as he had the right to expect, as a powerful ally, who, by a recent treaty, had just united his troops with those of France." The young Crown Prince, who was making his first appearance in the world, attracted general attention by his elegance and distinction. As to the King, he affected a content of which the curious despatch given below was the official expression.