Slave Coffle, House of J.W. Neal & Co, Washington, DC This image of slaves chained together marching from the House of J.W. Neal &amp; Co.in Washington, DC, was published in a broadside (or poster). The broadside was printed during an abolitionist campaign in 1835-36 designed to pressure Congress to end <a href="http://mallhistory.org/items/show/267">slavery in the nation's capital</a>. Library of Congress Prints and Photographs Division. <a title="detail, Broadside, Slave Market of America, 1836" href="http://www.loc.gov/pictures/item/2008661294/">View original.</a> 1836 <a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=38&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=1830-1859">1830-1859</a>