Good thread for this.....Someone mentioned on the Cape BReton Music list, that he had heard that Gordon Lightfoot's Wreck of the Edmund Fitzgerald had the tune based on a traditional one. His question was did anyone know the trad tune it was based on.
Later in the day someone came up with a possible tune name for it.
Right now I can't remember which tune it was, but if I come across it again, I'll pass it on.