T.W. Edwin Sowter à Queen's Park, Aylmer, Québec Légende de la diapositive No.68, de l'acquisition 1983-013 (PA210787), Bibliothèque et Archives Canada: 

"T.W.E. Sowter, geologist & archaeologist, old member of O.F.N.C. along lakeshore Deschenes, above Aylmer, Que.  Chazy formation, near the base. Queen's Park, Aylmer.  H.M.A. photo."