I was wondering if anyone has the words for a song apparently entitled "Jeff Davis." Grandpa Jones mentions it his autobiography and gives the opening lines

"Jeff Davis knew when the cruel war began
That he wouldn't be a Union man
Or carry the Union gun"

and attributes it to the Carter Family. He also mentions using the tune for his song "Going Down the Country." I was unable to find the Carter Family or anyone else doing it. I also contacted his nephew, Philip Steinmetz, who remembered the song but couldn't provide any more words or another source.