I have a James B. Stone who has similar circumstances; wounded, amputated leg, post-bellum suicide but he was in the Western Theater and not in Eastern Theater. Buried in Swamp Creek Baptist Church just off of Carbondale Exit in Whitfield County. He was in the 39th Georgia Volunteer Infantry.
I hope this helps.
Gerald D. Hodge, Jr.
War Between the States Historian
Historian: 39th Georgia Volunteer Infantry Regiment