[left that other site]

Charlie Daniels interprets a similar tale! (Just Jokin’ around with ya, Publius! LOL!)

[Publius]

The two pieces in fact have a common source. The movie "Crossroads" uses a blues guitar instead of a violin, but it's the same basic tale.

It all goes back to "Doctor Faustus" by Marlowe, and some say that Marlowe stole it from a German language original.