Preliminary chart of Agate Harbor, Lake Superior. Relief shown by hachures. Depths shown by soundings in feet. Includes sailing directions and note. On label pasted in lower left corner: Presented to Library of the Ills. End'l University, Detroit, Feb. 18, 1918, Comstock, Survey N. & Agate Harbor, Lake Superior. Agate Harbor, Lake Superior, Michigan , Keweenaw ,county , Agate Harbor ,bay

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