I did a blog post about Edward Tinkham (1719/20-1793) of Nova Scotia.
http://epluribus.me/2012/05/03/edward-tinkham-nova-scotia-ci...In it I listed the sources I used. Some of them may help you. I do know that my Edward had a son Sylvanus. It is such an odd name. You may find that he was the grandfather of your ancestor.