There's not many other photos. In fact I would say this is the only one. I'm not saying this kind of stuff didn't go on, but not on the scale they were showing in this movie where EVERY white guy this guy runs into basically wants to beat the sh*t out him like it's some kind of snuff flick.
The thing you have to remember is back then the abolitionists, the REPUBLICANS were trying to end slavery so they were going full out making it look as bad as they possibly could, and they used that book "12 years a slave" by Solomon Northup as another means to end it. I read that book from cover to cover by the way, and the impression I got not long after starting it was a lot of it seemed far fetched as if was written exclusively to use for the anti-slavery agenda which to me was a good thing. What I have a problem with is now the very people who were pro-slavery, namely the DEMOCRATS, have used that book exclusively to foment racial tensions today.