Osborne Anderson was among the five followers of Brown who escaped capture when U.S. Marines attacked the Arsenal to stop the raid.  He was the only African American to escape capture.  In 1861 Anderson, now safely in the North, wrote A Voice From Harper’s Ferry with assistance from Mary Ann Shadd, in which he described his role in the raid and argued that many local slaves would have welcomed their liberation and some in fact had helped Brown and his men. Anderson's account was the only one published by a member of Brown's party and provided a rare first hand description of the events and the motivation of these abolitionists.Â
"Of the slaves who followed us to the Ferry, some were sent to help remove stores, and the others were drawn up in a circle around the engine-house, at one time, where they were, by Captain Brown's order, furnished by me with pikes, mostly, and acted as a guard to the prisoners to prevent their escape, which they did. As in the war of the American Revolution, the first blood shed was a black man's, Crispus Attuck's, so at Harpers Ferry, the first blood shed by our party, after the arrival of the United States troops, was that of a slave. In the beginning of the encounter, and before the troops had fairly emerged from the bridge, a slave was shot. I saw him fall. Phil, the slave who died in prison, with fear, as it was reported, was wounded at the Ferry, and died from the effects of it… The first report of the number of 'insurrectionists' killed was seventeen, which showed that several slaves were killed; for there were only ten of the men that belonged to the Kennedy Farm who lost their lives at the Ferry, namely: John Henri Kagi, Jerry Anderson, Watson Brown, Oliver Brown, Stewart Taylor, Adolphus Thompson, William Thompson, William Leeman, all eight whites, and Dangerfield Newby and Sherrard Lewis Leary, both colored. The rest reported dead, according to their own showing, were colored." A Voice From Harper's Ferry