This entire system of stations and street-car routes is shown on diagram marked No. LXXX. If carried out, many times the present number of people can be handled in the center of Chicago; and all streets can be kept open on their present level north and south, east and west, giving every possible opportunity for circulation on foot and in wagons and carriages, since surfaces would be available for carrying people below and above the present grades. The better circulation of people on the streets and on street-car systems is not all or even the principal gain anticipated. Of first importance is the restoration to general business of the territory from State Street to the South Branch of the River, and from Van Buren Street south to Twelfth Street. This area is almost as large as our present central business district of Chicago, in which there can now be no extension of such of our great industries as can succeed only when operated in the very center of the business district. Present conditions are crowding out enterprising men and vast capital. This new area must be added to the old, and by no other means than those proposed can this be done. The regions north of the main River and west of the South Branch are filling up solidly and very rapidly with business, such as is not and never will be done on the old location from Van Buren Street to Water Street; meanwhile there is the most urgent necessity of extending the space for the kind of business that is and always will be done on such a location as the one proposed. If this is the case now, what will be the case ten years hence? We cannot act too promptly in regard to creating and maintaining perfect street circulation, car circulation, and extension of area for the heart of Chicago. We cannot get ready too soon for the enormous extension of all those facilities the necessity for which is already pressing. By the arrangement of passenger stations at Canal and Twelfth streets, the business center is convenient for pedestrians, and with the addition of the underground and overhead loops, the entire business district is within easy and comfortable reach. This applies to both through and suburban passenger traffic.