April 20, 1922, a memorial organ and screen were dedicated to members of the congregation who had died during the First World War. The organ is a 3-manual instrument with 26 stops. It is encased in an oak screen that bears the memorial tablet to those who died in the First World War and a tablet to those memorialized by stops in the new organ. The stops were subscribed for by members of the congregation in memory of departed friends and relatives.
Lieutenant-Governor Cockshutt unveiled the two bronze tablets during a ceremony conducted by Lord Bishop James Sweeney and Canon Macnab. The organ was designed by T.H. Palmer of Knox Presbyterian Church, Ottawa.
