I'm back, hello! Ok I've narrowed my search back to about 1753 and a John Corkill who was the father of John Corkill b. 1775 who married Elinor Casement. However this is where it stops. I really want to get it another 5 or so generations back. Feel like digging anyone? It looks like the John of the 1750's might have been illegitimate.