United States Department of the Interior Geological SurveySegar, Raymond W., 1914-2000Dark Lake quadrangle topographic map (N4737.5-W9245/7.5) featuring handwritten notations by Ray Segar in red ink and pencil regarding logging railroad lines and camps in the Dark Lake area of the Superior National Forest. The hand written notations include information on the following logging camps noted with 'C'.JPEGengUnited States Department of the Interior Geological SurveyPublicCommunicationDark Lake Quadrangle, Minnesota-St. Louis County, 1955: 7.5 Minute Series (Topographic) MapMapsMinnesota--Balkan TownshipMinnesota1955University of Minnesota