A slave auction in the Southern United States, print of a wood engraving from an original sketch by Theodore R. Davis (1840–1894), 1861; source: Harper's weekly, vol. 5, no. 237, 13. July 1861, p. 442, Library of Congress, Prints and Photographs Division Washington, Reproduction Number: LC-USZ62-2582 (b&w film copy neg.), http://hdl.loc.gov/loc.pnp/cph.3a06254.