Union general and onetime commander of the Army of the Potomac; the distinctive whiskers he sported gave rise to the word “sideburns.” ALS signed “A. E. Burnside,” one page, 5 x 4.25, McHenry House letterhead, January 8, 1866. Short letter complying with an autograph request. In full, “I take pleasure in complying with your request.” In very good condition, with even overall toning, bisecting horizontal mailing fold, small pencil notation and light wrinkling from a water stain. R&R COA.