I have seen this picture many times. I love looking at old photographs, especially when it is of someone so famous. This is Robert E. Lee, the most famous Confederate General of the Civil War. There are many pictures of him out there. This is reported to be the last picture of him in his Civil War Uniform. I believe he was dead when this picture was taken.. You can see the stand behind his feet, also called a dead clamp, that may be holding him up. I can't say for sure about it, but his hands are also clamped shut, which is another tell tale sign. Opinions? I find this practice fascinating and I look at old pictures a lot more closely now than I did before.