‘The Smithsoinan Spotlight also features Freedom Bound, Ends March 2, 2014, a similar photo.
In March 1863 a slave named Gordon enlisted in the Union Army in Baton Rouge, where the photographic team of McPherson & Oliver made a portrait of his whip-scarted back (click to view). Gordon’s story is one of 20 told in “Bound for Freedom’s Light: African-Americans and the Civil War,” an exhibit of vintage photographs and prints at the National Portrait Gallery.
The Smithsonian Magazine (Vol. 44 no.3 June 2013)
‘Bound for Freedom’s light: African Americans and the Civil War (click for actual photo)