At the invitation of the African Institution, Cuffe sailed to Great Britain to secure further aid for the colony, arriving in Liverpool in July, 1811. He was warmly received by the heads of the African Institution in London, and they raised some money for the Friendly Society. He was granted governmental permission and license to continue his mission in Sierra Leone. He also stayed with English officials and merchants in London and Liverpool, who were most hospitable and respectful of this intelligent, dedicated, and hard-working American Quaker black merchant who was full of positive ideas about what might be done to improve the colony of Sierra Leone and bring development to the African people. Encouraged by this support, Cuffe returned to Sierra Leone, where he and black settlers solidified the role of the Friendly Society. They refined development plans for the colony including building a grist mill, saw mill, rice-processing factory, and salt works. Relations between the United States and Great Britain were strained and, as 1811 ended, the U.S. established an embargo on British goods, including goods from Sierra Leone. This affected U.S. transatlantic trade, as well as trade with Canada. When Cuffe reached Newport, Rhode Island, in April of 1812, his ship the "Traveller" was seized by U.S. customs agents, along with all its goods. Officials would not release his cargo, so Cuffe went to Washiington, D.C., to appeal. He was able to meet with Secretary of the Treasury Albert Gallatin and President James Madison. Madison warmly welcomed Cuffe into the White House. This may have been the first time an African American had been a guest in the White House. Deciding that Cuffe had not intentionally violated the embargo, Madison ordered his cargo returned to him. Madison also questioned Cuffe about his time in Sierra Leone and conditions there. Eager to learn about Africa, Madison was interested in the possibility of expanding colonization there by American free blacks. The strained diplomatic situation with Britain erupted into the War of 1812. Despite this, it has been suggested that Madison regarded Cuffe as the leading U.S. authority on Africa at that time. Cuffe intended to return to Sierra Leone regularly, but in June 1812 the war started. As a Quaker pacifist, Cuffe opposed the war on moral grounds. He also despaired of the interruption of trade and efforts to improve Sierra Leone. As the war between the U.S. and Britain continued, Cuffe tried convincing both countries to ease their restrictions on trading, and allow him to continue trading with Sierra Leone.