I haven't heard the song, so I don't know if somebody has set the words to Lowe's 19th century tune The Witches. I ought to have the text in a book somewhere, if it's authentic, but I really can't think where (not Murray). I'm rather suspicious of that "crone and queen" bit, but I daresay we'll see eventually. Meanwhile, the copyright info from the cd would probably help; unless they've copped out and just said "trad".