No wonder Slidell was elated, so much so that he seems to have given little heed to the Emperor's sinister intimation that the whole affair must be subterranean. But the wily Bonaparte had not forgotten that six months earlier he had issued a decree of neutrality forbidding Frenchmen to take commissions from either belligerent "for the armament of vessels of war or to accept letters of marque, or to coöperate in any way whatsoever in the equipment or arming of any vessel of war or corsair of either belligerent." He did not intend to abandon publicly this cautious attitude--at least, not for the present. And while Slidell at Paris was completely taken in, the cooler head of A. Dudley Mann, Confederate commissioner at Brussels, saw what an international quicksand was the favor of Napoleon. It was about this time that Napoleon, having dispatched General Forey with a fresh army to Mexico, wrote the famous letter which gave notice to the world of what he was about. Mann wrote home in alarm that the Emperor might be expected to attempt recovering Mexico's ancient areas including Texas. Slidell saw in the Forey letter only "views ... which will not be gratifying to the Washington Government." The adroit Arman, acting on hints from high officers of the Government, applied for permission to build and arm ships of war, alleging that he intended to send them to the Pacific and sell them to either China or Japan. To such a laudable expression of commercial enterprise, one of his fellows in the imperial ring, equipped with proper authority under Bonaparte, hastened to give official approbation, and Erlanger came forward by way of financial backer. There were conferences of Confederate agents; contracts were signed; plans were agreed upon; and the work was begun. There was no more hopeful man in the Confederate service than Slidell when, in the full flush of pride after Chancellorsville, he appealed to the Emperor to cease waiting on other powers and recognize the Confederacy. Napoleon accorded another gracious interview but still insisted that it was impossible for him to act alone. He said that he was "more fully convinced than ever of the propriety of a general recognition by the European powers of the Confederate States but that the commerce of France and the interests of the Mexican expedition would be jeopardized by a rupture with the United States" and unless England would stand by him he dared not risk such an eventuality. In point of fact, he was like a speculator who is "hedging" on the stock exchange, both buying and selling, and trying to make up his mind on which cast to stake his fortune. At the same time he threw out once more the sinister caution about the ships. He said that the ships might be built in France but that their destination must be concealed.