O.F.N.C. Collecting Aboriginal Pottery at Sand Banks, Prince Edward Co. Caption of  lantern slide No.15, of Acc. 1983-013 (PA210785),  Library and Archives Canada: 

"Dr. R.W. Ells, Miss Helen Merrill of Picton, Ont., and Prof. Marshall on Geological Excursion to the Sand Banks, Prince Edward So., Ont.  Dr. Ells, former President of the O.F.N.C. collecting pottery of Aborigines.  H.M.A. photo."