An addition to my last post.
The below site address shows Benjamin F. Buck as dying Oct. 9, 1864 at Rock Island Prison Barracks, Illinois, and buried in grave 1551.
http://www.rootsweb.com/~ilrockis/cemetery/confed-b.htm
BUCK, BENJ.F. PVT A 49 TENN 10/09/64 1551