They did not know that they were seeking to maintain an impossible situation. China had adopted a similar policy, but already the cannon-balls of foreign powers had produced a change of view. If Japan had not peaceably yielded, the hard hand of war must soon have broken down her bars. For in addition to Russia there was now another civilized power with ports on the Pacific, the United States. And the fleets of the European powers were making their way in growing numbers to those waters. In a period when all the earth was being opened to commercial intercourse, Japan could not hope long to remain a little world in herself, like a separate planet in space. It was the settlement of California, and the increase of American interests on the Pacific, that induced the United States to make a vigorous effort to open the ports of Japan. Hitherto all nations had yielded to the resolute policy of the islanders; now it was determined to send an expedition with instructions not to take no for an answer, but to insist on the Japanese adopting the policy of civilized nations in general. It was with this purpose that the fleet in question had entered the Bay of Yedo. It was under command of Commodore Matthew C. Perry, who bore a letter from the President of the United States to the Emperor of Japan, suggesting the desirability of commercial relations between the two countries, requesting the supply of American vessels with coal and provisions, and demanding the kind treatment and prompt return of shipwrecked mariners. This letter, splendidly engrossed, was enclosed in a golden box of a thousand dollars in value, and was accompanied by numerous presents. The fleet consisted of the steam-frigates Susquehanna and Mississippi and the sloops-of-war Plymouth and Saratoga, being the most imposing armament that had ever entered a Japanese port. Perry was determined to maintain his dignity as a representative of the United States, and to demand as a right, instead of soliciting as a favor, the courtesies due from one civilized nation to another. The ships had no sooner dropped anchor in the bay than several guns were fired from a neighboring point and a number of boats put off from the shore. In the stern of each were a small flag and several men wearing two swords, evidently persons in authority. These boats were stopped at the ships' sides, and their inmates told that no person could be admitted on board except the principal official of the town, the high rank of the commodore forbidding him to meet any lesser dignitary. As one of the visitors represented that he was second in rank in the town, he was finally received on board the flag-ship, but the commodore declined to see him, turning him over to Mr. Contee, the flag lieutenant.