Correspondence, writings, speeches, legal and financial documents, maps, printed material, and other papers relating to Green's service as a member of Andrew Jackson's "Kitchen Cabinet," and as an unofficial representative (1840-1844) of President John Tyler in England and France. Subjects include the political rights of the South in the Union, retention of a free press, promotion of industrial enterprise, international trade, state rights, tariff laws, slavery and its abolition in Texas, presidential elections, free trade, commercial treaties between the U.S. and England, the Oregon question, and Green's business ventures in the U.S.

Correspondents include James Buchanan, John J. Cabell, John C. Calhoun, Lewis Cass, Richard Cobden, Richard K. Crallé, George Mifflin Dallas, John Henry Eaton, Sir Henry Ellis, Edward Everett, Lucretia Green, William Henry Harrison, Isaac Hill, Andrew Jackson, Amos Kendall, John MacGregor, James Madison, Sir Robert Peel, Zachary Taylor, Martin Van Buren, and Daniel Webster.