On April 7, 1918, three Toronto Vimy Ridge heroes plaques were unveiled in three different Toronto Anglican churches. Lieutenant Kappele's plaque is at St. Paul's Anglican Church and Lieutenant Gregory's plaque is at All Saints Anglican Church. The Captain Harry Stewart Boulter Plaque was unveiled in the Church of the Redeemer by Major George N. Molesworth of the 124th Battalion. The ceremony, conducted by Reverend C.J. James, was attended by members of the Mississauga Horse and members of the congregation.
Harry was born on 18 November 1892 to Harry C. and Effie Boulter in Toronto, Ontario. A lieutenant with the 9th Mississauga Horse, he joined the Canadian Expeditionary Force at this rank on 4 December 1915. He went overseas with the 124th Battalion and was promoted to captain on 2 January 1917. On 4 April 1917, while overseeing preparations for the Vimy Ridge offensive, Boulter was struck through the heart by a piece of shrapnel and killed instantly. He was buried in Villers Station Cemetery, France, with full military honours.
