A triumphant arch, the inscription on which denotes that it was erected in honor of the Roman Emperors Marcus Aurelius and Lucius Verus, is the only remarkable monument of antiquity in the place. It is much defaced, nearly buried in the ground and encumbered with mean houses; but as far as can be ascertained, it exceeds in beauty of design, proportion and parts, any other similar relique of Roman art. The immediate environs of Tripoli are desert; about two or three miles to the eastward is a rich and highly cultivated plain called the Messeah where the Foreign Consuls and the wealthy inhabitants of the town have their villas. As soon as the Sardinian squadron arrived before Tripoli, the Cavaliere Sivori who commanded it immediately landed with some of his officers on the guaranty of the British Consul, and had an audience with the Pasha. Yusuf at first assured him that every thing would be accommodated, but on the day succeeding he presented a note in which his demand for tribute was unequivocally stated, accompanied by other proposals equally insulting. The Cavaliere on this took his leave, and having recommended the subjects and interests of his master to the care of the British Consul, he retired to his ships determined to assert the rights of his country by force. The sea was too rough at the time to permit the approach of the ships to the town, without danger of their being stranded; but Sivori wished to lose no time, and to effect if possible immediately the destruction of the Pasha's shipping; he accordingly manned a number of boats which entered the harbor at midnight in three divisions, commanded by Lieutenant Mamelli. The expedition was perfectly successful; a brig of twelve guns and two schooners of six guns each were boarded and set on fire, during a heavy cannonade from all the surrounding batteries; the men then landed from the boats, and endeavored to force the gates of the dock-yard and custom house, but this being found impracticable, they retreated in good order to their ships. The next day the weather proving more favorable, preparations were made for an attack on the town; but Yusuf finding that he had mistaken the character of his assailants, and not wishing to subject himself to further loss, agreed to an adjustment, and signed a convention renewing the engagements made to Lord Exmouth in 1816.