MLSs of Chateau Frontenac in winter. LS of courtyard as official party arrives for ceremony. CU of D'Alton Corey Coleman, Canadian Pacific Railway President and External Affairs minister Louis Saint-Laurent. Shots of crowd, of DC Coleman introducing Louis Saint-Laurent. Shots of crowd, Royal Canadian Mounted Police, Canadian and American military officers looking on. Shots of Louis Saint-Laurent addressing crowd, unveiling plaque, shaking hands with Coleman. CU of plaque. Shot of VIP's posing, left to right: Louis Saint-Laurent, Coleman, US Ambassador to Canada Ray Atherton, British High Commissioner Sir Alexander Clutterbuck. CU of Atherton and Clutterbuck looking at plaque. (20/01/1947)