Thus secured from interruption, the American commerce in the Mediterranean rapidly increased, and the Tripoline corsairs were daily tantalized by the sight of large vessels laden with valuable cargoes, which were to be passed untouched, for no other reason than because they sailed under the striped flag and carried a piece of parchment covered with unintelligible characters. This must have been the more vexatious to the corsairs as they never met with ships of war belonging to the nation which they were thus required to respect. Reports of this nature did not fail to produce their effect upon Yusuf; his cupidity was excited, and he doubtless feared that his popularity might suffer, if his subjects were longer prevented from pursuing what had always been considered a lawful and honorable calling in Barbary. He had collected a small maritime force, estimated in 1800 at eleven vessels of various sizes, mounting one hundred and three guns, and thus considered himself strong enough to give up the further observance of a treaty with a power which appeared so incapable of enforcing it. In this idea he was encouraged by his naval officers. The chief of these was a Scotch renegade, who had been tempted to exchange the kirk for the mosque, and his homely name of Peter Lyle, with his humble employment of mate to a trading vessel, for the more sounding title of Morat Rais, and the substantial appointment of High Admiral of Tripoli. Rais Peter is represented by all who knew him as destitute of real talent, but possessing in its stead much of that pliability of disposition which is supposed to form an essential characteristic of his countrymen; however that may have been, he for some time enjoyed great credit with the Pasha, and employed it as far as he could against the interests of the United States. Whether this arose from any particular enmity, or from the hope of enjoying a share of the anticipated spoil, is uncertain; but to his influence was mainly ascribed the proceedings which led to a rupture of the peace. Another abettor of the war was the Vice Admiral Rais Amor Shelly, a desperate ruffian, who was most anxious to be engaged where there was such evident promise of gain. Hamet Rais, the minister of marine, was of the same opinion, and probably of all his councillors, Yusuf placed the greatest confidence in him; he is represented as a man of great sagacity and energy--such indeed, that Lord Nelson thought proper in 1798, to send a ship of the line, with a most overbearing letter, demanding his exile, which the Pasha promised, but after the departure of the ship thought no more about it. The only friend of the United States in the regency, was the Prime Minister Mahomet d'Ghies, whom every account represents as an honorable and enlightened gentleman.