Barney,

Here's some info for your gg grandfather from Ancestry.Com:

Name: John W Smith ,
Residence: Campbell County, Georgia
Enlistment Date: 12 August 1861
Service Record:
Promoted to Full 2nd Corporal (In 1863)
Enlisted as a Private on 12 August 1861
Enlisted in Company E, 35th Infantry Regiment Georgia on 12 August 1861.
Absent, without leave Company E, 35th Infantry Regiment Georgia on 28 February 1865

I don't know if you're aware but John Fox, author of Red Clay to Richmond: Trail of the 35th Georgia Infantry Regiment, CSA and recent winner of the James I. Robertson, Jr. Literary Prize for Confederate History, is a regular contributor to this site. I hope he sees your posting and replies.

In the meantime his book is available at:

Red Clay to Richmond

Hope this helps.

Jim Martin