Leefe, George E. Chicago and Rock Island Railroad Company. cartographic Maps. lcgft https://id.loc.gov/authorities/genreForms/gf2011026387 New York, [1852?] eng Outline map of the northeastern and north-central United States showing "railroads completed or in progress" and "railroads proposed & authorized unless named as 'projected.'" Description derived from published bibliography. Scale ca. 1:1,500,000. LC Railroad maps, Chicago and Rock Island Railroad Company--Maps. Railroads--United States--Maps. United States. Available also through the Library of Congress Web site as a raster image. http://hdl.loc.gov/loc.gmd/g3701p.rr003710