In April 1780, Gallatin secretly left Geneva with his classmate Henri Serre. Carrying letters of recommendation from eminent Americans (including Benjamin Franklin) that the Gallatin family procured, the young men left France in May, sailing on an American ship, "the Kattie". They reached Cape Ann on July 14 and arrived in Boston the next day, traveling the intervening thirty miles by horseback. Bored with monotonous Bostonian life, Gallatin and Serre set sail with a Swiss female companion to the settlement of Machias, located on the northeastern tip of the Maine frontier. At Machias, Gallatin operated a bartering venture, in which he dealt with a variety of goods and supplies. He enjoyed the simple life and the natural environment surrounding him. Gallatin and Serre returned to Boston in October 1781 after abandoning their bartering venture in Machias. Friends of Pictet, who had learned that Gallatin had traveled to the United States, convinced Harvard College to employ Gallatin as a French tutor.