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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. File Number: 09/pt1/25-1.1

    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. File Number: 09/pt1/22-1.1