I appreciate the time you put into this. It is helpful to have new eyes take a fresh look at things. I'll have to slowly review what you've written, I'm some of it will be helpful as I've found so little on them.
That's helpful to know about the Canadian census.
Just as a side note - Anna (Anne) Emily Fredricks - who married Fred Schatz & then Thomas Irwin (can't find anything on their marriage either) bred St Bernards in Grand Rapids, MI. One of her dogs was in the guiness book of world records as largest dog & of her puppies were in Beethove II.
She sold dogs to people all over the world. It's amazes me how little I find, on the internet, regarding her & her dogs. Pam Sands