Gray consequently transferred to the Columbia and set sail for Canton, then the great fur mart of the world. His voyage across the Pacific was prosperous, his furs were readily sold, and after taking a cargo of tea on board, Gray sailed for the Cape of Good Hope, and on the 10th of August, 1790, the Columbia entered the port of Boston, the first vessel to circumnavigate the world under the flag of the United States.
His success and conduct so impressed the owners of the ship that they immediately decided upon sending Gray back to the northwest coast, and seven weeks later, September 28, 1790, he sailed in the Columbia, which was described as a ship of two hundred and twelve tons, manned by thirty men, and equipped with an armament of ten guns.
Gray was also provided with a sea letter signed by George Washington, then President, which ran as follows:
“To all Emperors, Kings, Sovereign princes, State and Regents and to their respective officers, civil and military and to all others whom it may concern.
“I, George Washington, President of the United States of America do make known that Robert Gray, Captain of a ship called the Columbia of the burden of about 230 tons, is a citizen of the United States and that the said ship which he commands belongs to the citizens of the United States; and as I wish that the said Robert Gray may prosper in his lawful affairs, I do request all the before mentioned, and of each of them separately, when the said Robert Gray shall arrive with his vessel and cargo, that they will be pleased to receive him with kindness and treat him in a becoming manner &c. and thereby I shall consider myself obliged.
“September 16, 1790—New York City
(Seal U. S.)
“Geo. Washington,
President.
“Thomas Jefferson,