Hi! I'm sorry to say that what I posted is all I know of Frank McClain. He was someone who associated with my great-grandmother, Sarah Alice Marlow, born 1883 in Claiborne County to John Marlow and Mary Etta Harris. Because of the lack of definitive information, I was hoping that his name/description might ring a bell for someone tracing their ancestors in Claiborne County. It's a long shot, but I decided I might as well try. :)
PS: I did locate a John Frank McClain, but can't find any family to confirm/deny if he went by Frank.