Interesting picture. Where is it from and what is it of (other than the obvious)? A victim of inter-tribal or internecine warfare in Africa? The victim of a Belgian colonist in the Congo? A wayward servant of an Arab?
Slavery was and is a terrible thing. Even when it was practiced in the North. Even when New England shipping interests made fortunes trafficking in their sad cargo.
Inhumanity is evil, even when perpetrated in Detroit.
None of the above. It's a slave named Gordon who had been born in the U.S. and who had run away from the Gillespie (or Glasby) plantation and later joined the Union army. Harper's Weekly made a Northern hero out of him. Link.