I think Rory Gallagher (R.I.P.) is better known in Europe than North America and elsewhere. I might never have heard of him if I hadn't stumbled accross a film of him in a theatre in London in the '70s. As for the song, I guess it's obscure, unless you're a big fan. recorded 1971. The song has long been a favorite of mine.

As for the Dylan song, It's pretty obscure, unless you're a hardcore fan or an owner of The Bootleg Series Vol I. song recorded 1962

http://www.youtube.com/watch?v=h94w6Kn_14o

http://www.youtube.com/watch?v=EpWnF-w79nE