There was much hard work to be done by every officer in the squadron before it was ready to attack Tripoli in August, 1804, and Lawrence, as first lieutenant, did his part. Once before Tripoli, there was severe fighting as well as hard work. The fact that Decatur was taken out of his ship so often to lead a division of the boats, left the command of the Enterprise much to Lawrence, and he handled the little schooner in the most seamanlike manner. In the winter of 1804-5 the government determined to build a number of small gunboats, to renew the attacks on Tripoli in the summer. Some of the lieutenants who had returned to the United States in the changes necessary in the squadron, were selected to take them out to the Mediterranean. Lawrence, who had come back to the United States after spending two years in the Mediterranean, was given the command of one of these little vessels, Number Six,--for they were thought to be too insignificant to name and consequently were merely numbered. They carried a large spread of canvas, but their gunwales were so near the water that they looked rather like rafts than boats. On the way over, Lawrence was sighted by the British frigate Lapwing, which sent a boat to rescue them, supposing them to be on a raft after a shipwreck. Lawrence thanked the officer in charge of the boat, but proceeded on his way. Commodore Rodgers was then in command of the American force which again appeared before Tripoli in May, 1805; and without firing a gun a treaty of peace and the release of the Philadelphia's officers and men were secured. The squadron then sailed for Tunis, where it intimidated the Tunisians into good behavior and negotiated a treaty of peace under the threat of a bombardment. Soon after most of the vessels returned home. Lawrence recrossed the ocean again in his gunboat, and commanded her for some time after. On the 22d of June, 1807, occurred the painful and mortifying rencounter of the Chesapeake, frigate, with the British frigate Leopard, one of the most far-reaching events in the American navy. As the name of Lawrence will ever be connected with the unfortunate Chesapeake, the story of that unhappy event can be told here. The Chesapeake was a comparatively new ship, carrying thirty-eight guns, and was put in commission to relieve the Constitution in the Mediterranean. She seems to have been an unpopular ship from the first, as she was thought to be weak for her size, and was a very ordinary sailer. She was to wear the broad pennant of Commodore James Barron, who had Captain Gordon as his flag captain. Both of these men were esteemed excellent officers.