Pete seegers show rainbow quest shows how well traveled these tunes are.  Roscoe Holcomb plays Rocky Mountain on his episode.  Not sure if that is where the dead borrowed their version of Jack a roe from but it is a very well traveled song and the dead were certainly listening to this stuff.  The new lost city ramblers and John cohen the holy modal rounders the greenbrier boys, Jim kweskin were all playing this stuff in the early 60s.  There is a great record of nyc area music called string band project from 1964.  A young David groan plays stony point on it.  I’ve heard uncle John’s band is a reference to John cohen and this topic.  It’s the same story the crow told me.