Mob violence erupted in northern cities with regularity when abolitionist speakers came to town. This 1837 poster from Poughkeepsie, New York, exemplifies the extremely inflammatory language that kindled riots. Antislavery societies raised money to support these lecture tours, one way being the weekly pledge. This contribution box is inscribed with biblical passages and the symbolic yet disturbing image of the slave in chains. Poster: Library of Congress; Box: Boston Public Library/Rare Books Department—Courtesy of the Trustees.