David, I don't know if I've gotten back to you, or not, but here goes:
In the 1850 STewart Co., TN census, #988, Daniel BRIGHAM, 34, m, w, farmer, and listed under him are: Mary, 21 Missouria, 6 Laura, 4 Virginia, 3 Mary, 5/12 (I assume this would mean 5 months old) William HOLMES, 14, m, w, Tenn
There is definitely a listing here for Daniel BRIGHAM.
I have found no further info, yet.
My gg-grandfather, William F. HOLMES, who we were discussing, did end up in TX, around 1857/1858, but NOT in Rusk county.He went to southern Tyler county, which is a little bit south of Rusk county.
It would be a little strange to me, that if there is no relation here, for them to end up so close to each other!