Because of this he was naturally interested to observe one day, in the course of his peregrinations, that there existed in two places under the Chicago River—in the first place at La Salle Street, running north and south, and in the second at Washington Street, running east and west—two now soggy and rat-infested tunnels which were never used by anybody—dark, dank, dripping affairs only vaguely lighted with oil-lamp, and oozing with water. Upon investigation he learned that they had been built years before to accommodate this same tide of wagon traffic, which now congested at the bridges, and which even then had been rapidly rising. Being forced to pay a toll in time to which a slight toll in cash, exacted for the privilege of using a tunnel, had seemed to the investors and public infinitely to be preferred, this traffic had been offered this opportunity of avoiding the delay. However, like many another handsome commercial scheme on paper or bubbling in the human brain, the plan did not work exactly. These tunnels might have proved profitable if they had been properly built with long, low-per-cent. grades, wide roadways, and a sufficiency of light and air; but, as a matter of fact, they had not been judiciously adapted to public convenience. Norman Schryhart’s father had been an investor in these tunnels, and Anson Merrill. When they had proved unprofitable, after a long period of pointless manipulation—cost, one million dollars—they had been sold to the city for exactly that sum each, it being poetically deemed that a growing city could better afford to lose so disturbing an amount than any of its humble, ambitious, and respectable citizens. That was a little affair by which members of council had profited years before; but that also is another story. After discovering these tunnels Cowperwood walked through them several times—for though they were now boarded up, there was still an uninterrupted footpath—and wondered why they could not be utilized. It seemed to him that if the street-car traffic were heavy enough, profitable enough, and these tunnels, for a reasonable sum, could be made into a lower grade, one of the problems which now hampered the growth of the North and West Sides would be obviated. But how? He did not own the tunnels. He did not own the street-railways. The cost of leasing and rebuilding the tunnels would be enormous. Helpers and horses and extra drivers on any grade, however slight, would have to be used, and that meant an extra expense. With street-car horses as the only means of traction, and with the long, expensive grades, he was not so sure that this venture would be a profitable one.