1. Charts. St Marys River, head of Hay Lake to Whitefish Bay; with inset. Vicinity of Sault Ste. Marie, Mich. and Ontario, showing American and Canadian canals; St. Marys River chart 3. Scale 1:40,000. Bookmark Corporate/Agency Authors: Northern and Northwestern Lake Survey, Engineer Department, and War Department Publisher: Northern and Northwestern Lake Survey Date: June, 1932 SuDoc number: W 83.6/2:3/9