Railroad map of Illinois / prepared under the direction of, and presented by John R. Wheeler, Isaac N. Phillips, and J.C. Willis, Railroad and Warehouse Commissioners.Rand McNally and Company1892Imperfect: mutilated. Manuscript annotations on map.Includes a list of "Crossings equipped with interlocking and signaling devices approved by the Railroad and Warehouse Commission."Inset: Connections with Belt Line, Chicago.cartographic