Hi Betty---I got this information from the New Jersey Archives and from some material on file with the Tennessee Geneaological Society. There was an account book from the Morristown NJ area on file showing Thomas as a client from 1735-1755.
I've been researching this family because I have reason to believe that my great-grandfather's great-grandfather may have been Isaac's nephew. Do you have any information on Isaac's brothers? I know their names,but that's about it.
The Archives also mention an Archibald Morrison living near Morristown c.1735-1750. (con't.)