A Voice from Harper's Ferry is the abolitionist testament of Osborne Perry Anderson, the only surviving black participant in the 1859 raid on Harpers Ferry organized by John Brown. The book details the motivations and preparations for the raid, the events that unfolded over several days in October 1859, and Anderson's subsequent escape. It ends with a short selection of poems from various sources honoring Brown and the movement for abolition. (summary by JR Martin)