I believe you will find this was Carnesville in Franklin County, GA.

Name: William Sewell
Residence: Franklin County, Georgia
Enlistment Date: 14 Jul 1861
Side Served: Confederacy
State Served: Georgia
Service Record: Enlisted as a Private on 14 July 1861.
Enlisted in Company B, 15th Infantry Regiment Georgia on 14 Jul 1861.
Surrendered Company B, 15th Infantry Regiment Georgia on 9 Apr 1865 at Appomattox Court House, VA.

Also see this link.
http://ftp.rootsweb.com/pub/usgenweb/ga/franklin/military/civilwar/rosters/cob15.txt