I can locate this man on the 1870 census for Calhoun County MS, but find no one by that name in the county on the 1860 census. How did you identify him there?

A man listed as T. E. Foster served on a Tuscaloosa County Company, "D", 2nd Alabama Cavalry. He enrolled in the "Greensboro Guards", Co. "D", 5th Alabama Regiment, June 9, 1861, and transferred to this company a year later. Based on the 1850 census of Greene County AL, could be this is another man by the same name, but can't be sure.