Credit: Exclusive permission to reproduce these images was very kindly provided to the Toronto Project by the Map and Data Library, University of Toronto. These image may not be reproduced. Original links found here.
Click here for the full-size first image.
Click here for the full-size second image.
Apparently published in 1956, these "Business Section" maps are updated versions of maps originally published in 1945 by Nirenstein's National Realty Map Co., giving us an incredibly detailed view of Toronto's downtown business community in the 1950s.