On the 18th of August, the captain of an English cruiser entered the harbor with his boat, leaving the vessel outside, bringing the information that a suspected American trader was at Ambriz. The captain stated that he had boarded her, supposing she might be a Brazilian, but on ascertaining her nationality, had left her, and proceeded to Loanda, for the purpose of communicating what had transpired. On receiving this information, the commodore ordered the Perry to proceed to Ambriz and search the vessel, and in case she was suspected of being engaged in the slave-trade, to bring her to Loanda. In the mean time a lieutenant who was about leaving the squadron as bearer of dispatches to the Government, volunteered his services to take the launch and proceed immediately to Ambriz, as the Perry had sails to bend, and make other preparations previous to leaving. The launch was dispatched, and in five hours afterwards the Perry sailed. Arriving on the following morning within twelve miles of Ambriz, the commander, accompanied by the purser and the surgeon, who volunteered their services, pulled for the suspected vessel, which proved to be the American brigantine “Chatsworth,” of Baltimore. The lieutenant, with his launch’s crew, was on board. He had secured the papers and commenced the search. After taking the dimensions of the vessel, which corresponded to those noted in the register, examining and comparing the cargo with the manifest, scrutinizing the crew list, consular certificate, port clearance, and other papers on board, possession was taken of the Chatsworth, and the boarding-officer directed to proceed with her, in company with the Perry, to Loanda.