Erasmus Darwin Keyes (May 29, 1810 – October 14, 1895) was a businessman, banker, and military general, noted for leading the IV Corps of the Union Army of the Potomac during the first half of the American Civil War.
Source: Library of Congress Prints and Photographs Division. Brady-Handy Photograph Collection. http://hdl.loc.gov/loc.pnp/cwpbh.03189. CALL NUMBER: LC-BH831- 973[P&P] License: PD US