They are listed in the Oak Grove Cemetery, Conway, Faulker County, Arkansas.

Lyle Travers Hooker, March 23, 1904---May 3, 1978
Rubye White Hooker, Feb 12, 1903 ---- no date for death

The Faulkner County Cemetery book is just complete through Dec 31, 1987 so Rubye probably died after that date.