Jay,
Check with Mr. Huffman at this site, Durrett or Martha may have filed an application for a pension.
http://www.mississippiscv.org/pension_grave.htm
Durrett is also listed at this site as Dewett.
http://mscgr.homestead.com/MSCGRbak.html
Here is an image of the page with Durrett listed in 1860 Boone County, MO.
http://freepages.genealogy.rootsweb.ancestry.com/~mackley/Mo1860Jpegs/Boone_60/Boone_P0138.jpg
Hope this helps,
Mitchell