His name was still carried on the muster and pay rolls of the _Brandywine_; but that ship did not depart for South American waters until the last of August, 1826, when she set sail from New York with the _Vincennes_. Eventually it was Maury’s good fortune to be transferred to the latter vessel, in which he was to circumnavigate the globe. He first joined the _Vincennes_, on March 10, 1827, in Callao Roads, the port of Lima, Peru. The American warships had by this time entered the Pacific and were cruising up and down the South American coast from Valparaiso, Chile to Guayaquil, Ecuador to protect the commerce of the United States, as this part of South America also was then in turmoil. Bolivar, after liberating the states of northern South America from Spanish rule, was endeavoring to organize Columbia, Peru, Bolivia, La Plata, and Chile into a grand republic, of which he aspired to be the ruler. The union of the first three of these states was practically realized, but the undertaking finally ended in failure because of the jealousy of Bolivar’s former companions in arms and the fickleness of the South American people. This characteristic of the people is humorously set forth in Maury’s letters in which he describes some of the fighting which he witnessed at Guayaquil. The young man’s historical outlook was thus further broadened by this personal contact with the affairs of the great _Libertador_, Bolivar. On July 4, 1829, the war meanwhile having come to an end, the _Vincennes_, under the command of Captain William Compton (Bolton) Finch, set forth from Callao on her voyage across the Pacific. She was to make her first stop at the Washington Islands, now known as the Marquesas, in order, as Captain Finch’s orders read, to secure proper treatment from the natives for any of our defenseless seafaring countrymen who in their lawful pursuits were compelled by necessity to resort to the harbors of the islands for refreshment and supplies; to reclaim those who from improper motives had remained among the islanders; and by exhibiting the moral advancement of America to so raise the American national character in their estimation as to induce a praiseworthy imitation of it on their part. The ship arrived at one of the islands, Nukahiva by name, on July 26, and in order to carry out the spirit of his orders Captain Finch made his vessel a “tabu ship” that he might prevent the gross licentiousness to which ships from Christian lands were usually surrendered in those ports.