Most of the information appears correct except that I do not accept that Wilmouth Langston married Uriah Britt. Wilmouth did have a son named Uriah Pickney Britt.
I have not found marriage records in Johnston County for the Rigdon Britt and Wilmouth Langston marriage. However, The Johnston County Voter Registration Records from 1902 (http://www.johnstonnc.com/jc_hc_votername.cfm
) for E. P Britt (age 25) and J.M. Britt (age 27) both children of Uriah Pickney Britt, son of Wilmouth Britt, identify their ancestor as Rigdon Britt. This proved, for me, that Wilmouth was the wife of Rigdon Britt.
In these records A.P. Britt (age 61) also identifies Rigdon Britt as ancestor, I am not sure how this person is related to Rigdon.