I have e-mailed you privately with Fergus O'Byrne's contact -- he might be able to help you.Dermot O'Reilly sings this song on the CD "All The Best -- Folk Music of St. John's Newfoundland," Pigeon Inlet Productions PIPCD 7322.
The liner notes imply that O'Reilly wrote it, inspired by his adopted hometown of Torbay, Newfoundland.
I don't know if this CD is still out, but it's well worth getting if you can find it. You can ask at http://www.bpm.on.ca (with which I have no connection) as they are reliable and generally very good at tracking down Canadian folk CD's.