I'm from the Wes Prater line. One of his daughters, Juda "Judy", married a Moore (a Moore is listed as Morgan's undertaker). Wes was first married to a Beverly. An Elisha is listed as a nephew in Nelson's home in 1910 census. Wes's first wife's family had an Elisha Beverly in it and the name Elisha Prater was given to one of the grandsons. The closeness of the homes on Pond, Pike, KY, and the names listed lead me to believe this is indeed Margaret. I have Elizabeth "Tisie" Davis' Death Cert. somewhere. I will try to find it.
Of course this is all just supposition on my part the only things I know for sure are the names on the census and the names on the death certs.
If you learn anything new please let me know. Do you have any pictures of Margaret's children or William Wadkins's line? If you do would you share them with me?