Yes, I noticed this when I was last at the National Archives searching through the 'discovery' bit. I live quite far away from Bedford, but I hope to go there in the summer, and also view the parish register for the marriage of Henry Robert Shelton and Elizabeth Bryant, as it might give away some clues as to how Elizabeth Bryant is related. I'm wondering if she could possibly be Thomas' daughter? I know there's no baptism record, but there's a gap between his child in 1814 and his child in 1823, which Elizabeth could fit quite nicely into. I haven't got baptisms for his two youngest children on the census either, although would a family name their daughters Elizabeth and Eliza?

I think those are most probably Mary and Elizabeth Richardson, however I have no clue as to who John Bryant is. Possibly he is another brother of Thomas and Bonfield, however, there's no record of his birth at all along with the other Bryants, however there are many records that I believe may be missing or just not transcribed on freereg.org, as there are many gaps in the family.