I have a copy of the will of John Cash (1), probated 1725, in which he left part of his plantation, Huckilberry Hill, on a fork of the Potomac River, to his wife, Mary (Dawson) Cash and to his son, John. I do not have a reference to Caleb Cash. I have an extract of a will from Edward Dawson, circa 1735, in which he left part of his property to one son and some to "my grandson, John Cash."
I think this John Cash is one generation too young to be the father of my John Cash who fought in the Revolutionary War.
Any information you might have would be useful and I will reciprocate.
I don't know if this shows email addresses or not, but mine is firstname.lastname@example.org