You might want to try a gentleman by the name of John Selwyn MILLS. He has written a book about the Nova Scotia, Maine and Connecticut Mills titled: Robert and Thomas MILLS; Two old Geezers.
I don't see your Freeman or Isaiah in the book but he may have yours in his notes. Good luck, his address is:
18 Wilson Road
Riverview, New Brunswick, Canada
(Note there zip codes are very different than the US and don't use CA or it might be confused with California.)email@example.com
is his email address but not sure that will stick in one of these posts. again its jillsj at nb dot ca