World War I rehabilitation in Hart House - shown here patients with physiotherapists.

Polish Class at the COTC, School of Infantry, University of Toronto, Jan. 3rd to April 3rd 1917

"Farmerettes", home service workers during World War I

University "Sniper", UofT COTC, Camp Niagara 1915

Major C.R. Young, Polish Army Camp, Niagara on the Lake

Harold Innis at Vimy, France.

Grave site with granite cross for General J. Halles of Poland.

Frederick Coates applying face mask to WWI soldier

Map of Lens stored in Harold Innis' war diary.

Letter from the Brigadier General of the Royal Flying Corps to Vincent Massey regarding use of Hart House

Halt, Field Day May 10 1915, University of Toronto COTC training at Niagara on the Lake.

Signallers, University of Toronto COTC training at Niagara on the Lake.

Overseas Training Company, trenches north of Forest Hill

President Falconer with COTC Officers

An overseas draft in training along King St., Niagara on the Lake

Father Rudlewski at Niagara Camp, Polish Army, July 28 1918

Polish Camp, Niagara-On-the- Lake