Allan,
regarding Mary Oakes's Will (Cranage 1808), I note:
my 3x great grandfather's (John 1784) parents, Thomas Oakes/ Mary Cawley (married 4th Nov 1783, St Wilfrid's, Davenham) were resident in Davenport (Cheshire Parish Records), which is very close to Cranage!
So, is it Mary Trelfa's Will?
Note, I mention a relative who has been invaluable in above posts, so I would like to credit her, my neighbour, too, you Allan and other forum contributors who have helped to construct my (partial) tree, as I currently understand it.