Lallemand arrived in Boston in the ship Triton, from Liverpool, under the assumed name of Gen. Cotting. According to the New York "Columbian" of April 29, 1817, quoting from the "Evening Post", he was smuggled on board the Triton at Liverpool. "On leaving the river, as the Custom House boat passed from ship to ship to examine the rolls, the General was passed in a boat to and from several ships, so as to evade the boarding officer." The next day, April 30, 1817, the Columbian reported: "two more of Bonaparte's late officers have arrived at Boston, from Leghorn--Dufresne Cyprion and Liell Memon." Lallemand, at Philadelphia, became a president of the French Emigrant Association, an organization that gained a grant of four townships in what is now Alabama for a Vine and Olive Colony. There were rumors that Lallemands would try to rescue Napoleon or put his brother Joseph on a throne in South America.