there is a Tunstall.
and I 'm think of the top of my head my
great- Aunt Fanny (Merrel) Lafferty
was married to a Tunstall he died there
not sure if its the same one you are looking for
buried there but,
the cemetery is over grown now, you can see some graves my Great -Grand dad -is buried in the middle
just south of the barn i go clean it out some times his name was :
Burl C. Lafferty and there is a Albert Merrel
buried next to him i think it was his wife's X- brother law?
his (Burl's) wife Mary Caledonia---
was married to a William Merrel--- 1st.
the cemetery needs to be clean out real bad.
its in such a isolated area .