In New York, information was given to the United States Marshal that a vessel had been chartered by persons concerned in the proposed expedition, and was anchored in the Bay, provided with munitions of war, and waiting for the arrival of a large number of men. On searching the harbor, no vessel answering this description was found, but a steamboat lying at a pier on the North River fell under suspicion, and was seized by the United States authorities. This was the Cleopatra, a large boat, formerly employed on Long Island Sound, and now in such a decayed condition as to be nearly unfit for service, having been built upward of fourteen years. Nothing was found on board to indicate the purpose for which she was destined. The forward hold and boiler room were filled with coal, of which a large quantity also covered the forward deck. She had on board a great number of empty water casks, but no firearms or gunpowder were discovered. She was placed in charge of a guard of marines from the Navy Yard, and no communication was permitted with persons on shore. The final disposition of the steamer has not yet been determined, but orders have been given by the Government to deliver her cargo to any claimant who could show evidence of proprietorship. Soon after the seizure of the Cleopatra, the collector of this port received notice that a vessel engaged for the transportation of emigrants from South Amboy to Sandy Hook, was lying at her wharf, in the former place, under suspicious circumstances. Officers were immediately dispatched to the spot; the vessel was seized and ordered to anchor at Perth Amboy; and intelligence was obtained which resulted in the arrest of five persons, who were held to bail in the sum of $3000 each to appear for examination. These were John L. O'Sullivan, formerly editor of the _Democratic Review_, Captain Lewis, formerly of the steamer Creole, Pedro Sanches, a Spanish resident of New York, Dr. D.H. Burnett, and Major Louis Schlesinger of the Hungarian patriots. The offense with which they were charged was the violation of the Neutrality Act of April 20, 1818, in preparing the means for a military expedition against Cuba.