Thanks for responding; however, this Thompson is not related to mine. Here is 1880 census, High Prarie, MO:
George Thompson 49 b. in TN
George W. 10
Francis M 8
William J 3 months

Do you have access to Cemetary listings? Leda Thompson died June 25, 1977 and was buried at "Oaklawn" per funeral hone. I'm sure her husband, francis Marion Thompson is also buried there. Perhaps death date would be on his stone.