The Patrick Morris was a rail-car ferry running between Cape Breton and Newfoundland. The other ferry was the Ambrose Shea (not Shaw).
You can get Bob Reid singing it along with his lyrics on Gest's site of Newfoundland songs. (I am puzzled what this has to do with Marilyn Bell.)
Here is the link to GEST. Under "L" find Loss Of The Patrick Morris. I can't make the link work direct.
GEST