Have you tried White County Arkansas? They have a wonderful site ran mostly by the White County Historical Society.
There were several around Albion out from Searcy about 6 or so miles. I never knew these folks nor am I related to any of them.
One who happened to be the step brother of my mother-in-law used the nickname of Cap Poe and I believe there really was a Capt. Poe during the Civil War who later resided in that area.
This site focuses on the Civil War. If you had his father's name who would have probably fought for the the CSA, it might be possible to actually use this site.
Good luck.