I have a family tree prepared by a fairly distant cousin that lists a Henry Coleman Chisom, b. 1824, as my great-great-great grandfather. The tree mentions that he served in the Civil War, although he seems a bit old for that. The tree says he was in the 24th Virginia Infantry, Co. K, although I haven't found him on any rosters. I have found evidence of an H.C. Chisom that served with the 52nd Virginia Infantry, but have not been able to confirm that it's him.
Although I've found traces of other Chisoms in the same area prior to Henry, I have not been able to link them. If you've found anything, please let me know! Thanks.