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Between the former site of old Fort Dearborn and the present site of our newest Board of Trade there lies a restricted yet tumultuous territory through which, during the course of the last fifty years, the rushing streams of commerce have worn many a deep and rugged chasm. These great canons—conduits, in fact, for the leaping volume of an ever-increasing prosperity—cross each other with a sort of systematic rectangularity, and in deference to the practical directness of local requirements they are in general called simply—streets. Each of these canons is closed in by a long frontage of towering cliffs, and these soaring walls of brick and limestone and granite rise higher and higher with each succeeding year, according as the work of erosion at their bases goes onward—the work of that seething flood of carts, carriages, omnibuses, cabs, cars, messengers, shoppers, clerks, and capitalists, which surges with increasing violence for every passing day. Summary by HENRY B. FULLER