Here’s a neat old postcard of the Armouries with a giant “Mobilization Centre” banner across the front. As for a date, I’m guessing pre-1920. What was the Mobilization for? The Influenza outbreak of 1918? World War I?
It’s nice to see the building with all the original windows. The building was built in 1900, and it was designed by Ottawa architect David Ewart, the chief architect for the department of public works, of the Dominion of Canada. Locally, Ewart also designed the Sandwich Post Office.