Caption of lantern slide No.68, of Acc. 1983-013 (PA210787), Library and 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."
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