Hi Bill:
Looks like you found some gold nuggets there.
For those interested in researching further, perhaps the RMR might have more details and photos of the troop in action. There might be a match up for the last couple of digits on the census number... it is in a distinctive font.
Here's their URL:
http://www.royalmontrealregiment.com/english.html
The Adjutant should have contact information for their Museum curator.
Cheers, Mike