Fire Insurance Plans: https://library.carleton.ca/find/gis/geospatial-data/georeferenced-ottawa-fire-insurance-plans 

Google spreadsheet: https://docs.google.com/spreadsheets/d/1WnkScUoV-9gRx2Gx1MRR09rWjf0-VCW7MIp5YQPptLY/edit?usp=sharing