I take that this is the man himself, Fergus O'Byrne that I ever heard sing the song. I've noticed a few other songs under the same title that have a few similar lyrics so maybe it's a Newfoundland spin off one of those or an alteration of one of those. I'm sure you've already thought of that but those are my suggestions nonetheless.

If this is Fergus would you be able to tell me where you got the song Jolly Jack and who was the man who sang it to you. I saw him on a CBC special not to long ago when you were with Ryan's Fancy and were down to his house twice but I forgot his name before I had a chance to write it down.
Shane Greene