This is great work, Teddy.
Fascinating to see old ridings in MTL and Toronto.
As a kind of side note, it's interesting to see the evolution of the "York Direction" names from their geographically sane origins. In the pre-WWII map, the last before Teddy's maps here start, as you can see
here, York County (i.e. present day Toronto+York Region) outside Toronto was just divided into North, South, East and West based on direction, with South being a somewhat urban riding including the industrial town of Weston. Then in the post-1947 map shown here, York Centre is created along with a couple of other suburban ridings, but still the geographic directions basically make sense (though York East is no longer at the east
end of the county since the rural part got the new Scarborough name). But after various gradual shifts, you get to the current situation where even though Toronto has been
separated from York Region, the only remaining names are a cluster in northwest Toronto, which just makes no sense.