Well, I could show you photos of Mancy Carr and you'd classify him as white but under the one-drop rule he was classified as black.

Great jazz trombonist Kid Ory--black or white?

However, since there is no controversy surrounding Clarence Ashley that I know of and I was simply going by one indistinct photo--and admittedly almost never listen to folk, I will retract my listing of Clarence Ashley as black.

Thanks to all who responded.