Birtle, Postcard A postcard of Birtle in the 1930s. From Manitoba Historical Society. Related Similar Images ...based on the tags: historical-image... The remains of Unit 5… Entry doors and escape hatch at a similar base. From Library of Congress, Prints and Photographs Division, Historic American Engineering Record [HAER MN-100-65] Gering’s Evaporators, 1916, Colorado State Library Sawyer System in action aside Globe. Globe from the side of Great Northern. Sawyer Unloader (Gallagher, Duluth Public Library) Approaching Allouez (Emory Ford Collection) A detailed map showing the property in 1886 (Sanborn Fire Insurance Co). Sattler’s Department Store (Source: forgottenbuffalo.com) A 1917 ad for Miscampbell Trucks (Duluth News Tribune). Construction of the lower portal of the tunnel begins. On top of the hill, another crew is working to make the job go faster. Circa 1906, courtesy Minnesota Historical Society.