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    A postcard of a bird's eye view of Lock Three on the Welland Ship Canal (fourth canal) on the St. Lawrence Seaway, St. Catharines, Ontario. 1969. Published by Peterborough Airways Ltd., Peterborough, Ontario.

    A postcard of an aerial view of Port Dalhousie and harbour with the Old Welland Canal entrances visible, St. Catharines, Ontario. 1965. Published by the Peterborough Post Card Co., Peterborough, Ontario. Printed in Canada.

    A postcard of a bird's eye view of Lock One of the Welland Ship Canal (fourth canal) showing the entrance for up-bound Great Lakes and ocean going vessels. Port Weller, St. Catharines, Ontario. 1965. Published by the Peterborough Post Card Co., Peterborough, Ontario.