I have gradually put together a similar scenario - though I don't have the resources you obviously have.

I am helping a friend with her tree, and her link is via Thomas & Mary's daughter, Leah, b 1832-3 East Dean and bap 1 Dec 1833 Mitcheldean.

She married James COOK on 25 Dec 1854 at St John the Evangelist, Cinderford.

I'd be interested to know:
(a) whether any more definitive detail was found for Thomas's (b ca 1789 English Bicknor) marriage to "Mary" (b 1795-6 East Dean)
and
(b) if anyone else is researching Leah's descendants.

Christine