VAN BUREN, Martin. Document signed (“M. Van Buren”), as President, Washington, 8 February 1839. 1 page, 4to. An order to affix the Seal of the United States “to the ratification and the ratified copy of the Convention with the Mexican Republic for the adjustment of claims of citizens of the United States…” An interesting piece of Texas history, as the U.S. and Mexico enjoy a peaceful pause after the two years of bloody fighting between Texas settlers and the Mexican government in 1835-1836, and the renewed hostility and full-blown war that followed Polk’s annexation of Texas in 1845. -- VAN BUREN. Autograph letter signed (“M. V. Buren), as Senator, TO SECRETARY OF WAR JOHN C. CALHOUN, Albany, New York, 1 August 1821. 1 page, 4to, address panel in Van Buren’s hand. In full: “Mr. Grosvenor brother of the late Thomas P. Washington with the view of soliciting some appointment in your Department. I have not the pleasure of a personal acquaintance with Mr. G. but at the request of my friend M. Talcott, Atty General of this State, whose wife is a connection of Mr. G., I take the liberty of adding my wishes for his success, to those of his friends.” At this date Van Buren and Democratic supporters established the so-called “Albany Regency,” a powerful political machine which dominated New York politics for many years.