I believe I've found Preston in the 1910 census of Shelby County. He's age 71, listed as Black, and employed as a servant for a Black family. This is the census that designates in box # 30 if the man was a Confederate or Union veteran usually by a CA or UA. They also used a numerical code that I'm not familiar with. Preston has a #2 in box #30. Mr. Cartwright says he died in June, 1910. This census was recorded on March 30-April 1, 1910.

Glenn