Hello,
Just looking on Ancestry and I stumbled across a family tree which may of course represent your research so far....................... or maybe it is something new to you?
I have found Thomas, born to Benjamin and Sarah in 1751 married to Ann Tarbox who was born in 1758. It appears that there is the child Thomas you mention in 1774 and then the family perhaps move to Great Gaddesden where an incredible list of further children appears................
Perhaps this is where a lot of speculation and unconfirmed children have been found but there are 16 children listed to Thomas Hall and Ann Tarbox, could this be right? There are two names that are repeated as another Thomas is born in 1784, and there are Sarah's listed in 1781 and 1786. As only a beginner I cannot possibly speculate what the meaning is there.
Does any of this help?
Good luck with your search.
Toby