He asked for this information, as the Navarre was boarded when under American colors, although displaying Brazilian colors when captured. In reply, the English captain informed him that the slave barque Navarre, seized under the Brazilian flag, on the 19th instant, had the American ensign flying at the time she was boarded. The boarding-officer having doubts of her nationality, in consequence of her papers not appearing to be regular, he himself, although ill at the time, considered it his duty to go on board, when, being convinced that her papers were false, he informed the person calling himself master of her, that it was his duty to send him to the American squadron, or in the event of not falling in with them, to New York. The master immediately went on deck and ordered the mate to haul down the American ensign--to throw it overboard--and to hoist their proper colors. The American ensign was hauled down and thrown overboard by the mate, who immediately hoisted the Brazilian ensign. A man then came on deck from below, saying that he was captain of the vessel; that she was Brazilian property, and fully fitted for the slave-trade; which the person who first appeared acknowledged, stating that he himself was a Brazilian subject. Having obtained this from them in writing, the person who first called himself captain having signed it, and having had the signing of the document witnessed by two officers, he opened her hatches, found all the Brazilian crew below, slave-deck laid, water filled, provisions for the slaves, and slave-shackles. At this period the agent of a large and respectable commercial house in Salem, Massachusetts, established at Loanda, submitted to the commander of the Perry a copy of the treaty between the United States and Portugal, together with a letter from the Secretary of State, and a paper from an officer of the Treasury Department, exhibiting the commercial rights of the United States under said treaty. The agent claimed that agreeably to the treaty, a portion of the duties were to be remitted when a vessel arrived direct from the United States; which claim had not been acknowledged at Loanda, on the ground that the vessels were in the habit of touching at the native ports, while the agent insisted that as these ports were not recognized as within the jurisdiction of a civilized government, the Portuguese provincial authorities had not faithfully observed the treaty stipulations. The subject was referred to the Government.