African colonization--slave trade--commerce [electronic resource] : report of Mr. Kennedy, of Maryland, from the Committee on Commerce of the House of Representatives of the United States, on the memorial of the Friends of African Colonization, assembled in convention in the city of Washington, May, 1842 : to which is appended, a collection of the most interesting papers on the subject of African colonization, and the commerce, etc., of western Africa, together with all the diplomatic correspondence between the United States and Great Britain, on the subject of the African slave trade