Is there a vacant site next to the wife's marker? Sometimes the family could not afford a burial marker. I know of a situation like this in my wife's family which dates from 1943. The death certificate tells us where she's buried, and her husband's 1926 marker in the cemetery has a vacant plot on one side.

John L. Frazier's CSA dates should be 1863-1865, not 1862. He enrolled after the retreat from Gettysburg and the fall of Vicksburg.