The Hydraulic ran alongside of the Academy, and at recess the boys had a good deal of fun with it, one way and another, sailing shingles with stones on them, and watching them go under one end of the culvert and come out of the other, or simply throwing rocks into the water. It does not seem very exciting when you tell of it, but it really was exciting; though it was not so exciting as to go down to the mills, where the Hydraulic plunged over that great wheel into the Miami. A foot-bridge crossed it that you could jump up and down on and almost make touch the water, and there were happier boys, who did not go to school, fishing there with men who had never gone. Sometimes the schoolboys ventured inside of the flour-mill and the iron-foundry, but I do not think this was often permitted; and, after all, the great thing was to rush over to the river-bank, all the boys and girls together, and play with the flutter-mills till the bell rang. The market-house was not far off, and they went there sometimes when it was not market-day, and played among the stalls; and once a girl caught her hand on a meat-hook. My boy had a vision of her hanging from it; but this was probably one of those grisly fancies that were always haunting him, and no fact at all. The bridge was close by the market-house, but for some reason or no reason the children never played in the bridge. Perhaps the toll-house man would not let them; my boy stood in dread of the toll-house man; he seemed to have such a severe way of taking the money from the teamsters.