Canada's First Air Mail
At 10:12 a.m. on June 24, 1918, Captain Brian Peck of the Royal Air Force and mechanic Corporal C.W. Mathers took off from the Bois Franc Polo Grounds in Montreal in a JN-4 Curtiss two-seater airplane. They had with them the first bag of mail to be delivered by air in Canada. Wind and rain buffetted the small plane and forced it to make refuelling stops at Kingston and Deseronto. Finally, at 4:55 p.m., Peck and Mathers landed at the Leaside Aerodrome (immediately southwest of here). The flight had been arranged by a civilian organization, the Aerial League of the British Empire, to demonstrate that aviation was the way of the future.
Plaque via Alan L. Brown's site Toronto Plaques. Full page here.