Hi Scott

I have just had a look through my database for the Hale families from the Forest of Dean that I have been trying to put together and can find no record of a marriage of a Thomas and Mary in the timescale you mention. The only Thomas I have who married a Mary (and I don't know where I got the information from unfortunately) was a Thomas who married a widow named Mary Sier 19 Jul 1779 but that seems too early when you look at the christening dates of the children.
I have amalgamated quite a few on my database now but unfortunately when you have the same name parents with same name children it takes a bit more time trying to match the right ones up. I also have most registrations up until about 1950 in births, deaths and marriages.
I will keep you posted in case I come across any in due course.
Regards Diane