For anyone interested in the Scotch-Irish contribution to Appalachian English, I recommend two papers by Michael Montgomery of the University of South Carolina:
1. The Roots of Appalachian English: Scotch-Irish or Southern British? (Appalachian Studies Conference, 1990).
2. How Scotch-Irish Is Your English? The Ulster Heritage of East Tennessee Speech (Journal of East Tennessee History 1995).
I have hard copies of these but they are probably still available on-line.
thanks! Probably just what I have been looking for for years.