Patrick Whelan (official site) is an Irish-born folk-blues musician who has since moved to London and, ultimately, Pennsylvania to ply his trade.
He's only released one album, so there's little about him online outside of his official site. This version is credited to Mississippi John Hurt, though it doesn't sound a lot like Hurt's 1928 take. (It's from a later version, which I haven't posted here yet.) This is also another version where the hat is magical, which we don't hear about often enough for my taste.