"Oh! I am afraid that is too long a story to tell during the time that we have left. There seems to be no limit to the engineering skill of to-day. The world-famous structures are being surpassed every little while by new ones. To-morrow you must see the Brooklyn Bridge. We have supposed that this great suspension bridge with its sixteen hundred feet from tower to tower was about the limit. But the cantilever bridge over the Forth in Scotland has a span more than a hundred feet longer than the East River bridge. When the North River bridge is built to Jersey City, with its proposed span of three thousand feet, these other great bridges will be small in comparison. "Our bridges are mostly of steel rather than wood nowadays," he continued. "Since the Portage viaduct on the Erie road, which was eight hundred feet long and two hundred and thirty feet above the river, and contained a million and a half feet of lumber, was wholly burned in 1875, wooden bridges have usually been but temporary affairs. In these days of frequent trains, the engineer's skill is needed on the shorter bridges as well as on these enormous structures. Iron towers were put in place of stone towers, and iron beams in place of wooden ones, at the Niagara Suspension Bridge, without interfering with the trains. I read the other day how a new iron bridge took the place of an old wooden one. It was built across the river by the side of the railroad track; during the night, when there was less travel than during the daytime, the old bridge was moved off, the new one took its place, and in a few minutes trains were running over it. Whatever engineering work is needed nowadays, some one will soon be found prepared to provide it." At last the train entered the long cut and series of tunnels, which finally brought it to the Grand Central station on Forty-Second Street, New York City. Hurried along by the crowd, the aged sightseer hardly had an opportunity to make a remark about the immensity and grandeur of the brick station. "But this station is poor and far behind the times," said Mr. Towne. "You should see some of the more modern ones that have recently been erected, or wait for the new New York station, which must soon be built. But let us hasten; I want to get home." The young drummer, accustomed to travel of all kinds, familiar with crowds, and wont to make his way anywhere, did not realize that his companion was having difficulty in keeping up with him as he hastened along the street. Receiving no answer to a question that he asked, he glanced around to find that his uncle was not with him. Inwardly accusing himself of remissness in forgetting his companion's lack of experience, he turned and rapidly retraced his steps. He found his uncle standing on a corner, not daring to cross the street; to the relief of the latter, he decided to take a horse car across town.