Another source, Robin, is to find the three volume set of books from Ken Peacock, which (I think) is titled Songs of the Newfoundland Outports. It should be in most university libraries. It was published by the National Museum back in the late fifties or early sixties. Some of these songs were also common in Nova Scotia, so you might also look at some of the songbooks from Helen Creighton. Check out your local library.