Many thanks to PEACE for the reference to the very interesting 2002 Silberberg book, but since Kingery is an 'old guy from Kentucky' I think I'll go on believing that he somehow conveyed the tune and fragment of companion lyrick till I learn otherwise.

The Sally lyrics presented by Azizi are interesting, and I imagine that there are lot's of songs about 'her' but it doesn't quite get to the mud of it all, so the question is still posed, may the thread continue. Didn't I say it would be tough...