Besides the bridge, the school-houses, the court-house and jail, the port-houses and the mills, there was only one other public edifice in their town that concerned the boys, or that they could use in accomplishing the objects of their life, and this was the hall that was built while my boy could remember its rise, for public amusements. It was in this hall that he first saw a play, and then saw so many plays, for he went to the theatre every night; but for a long time it seemed to be devoted to the purposes of mesmerism. A professor highly skilled in that science, which has reappeared in these days under the name of hypnotism, made a sojourn of some weeks in the town, and besides teaching it to classes of learners who wished to practise it, gave nightly displays of its wonders. He mesmerized numbers of the boys, and made them do or think whatever he said. He would give a boy a cane, and then tell him it was a snake, and the boy would throw it away like lightning. He would get a lot of boys, and mount them on chairs, and then tell them that they were at a horse-race, and the boys would gallop astride of their chairs round and round till he stopped them. Sometimes he would scare them almost to death, with a thunder-storm that he said was coming on; at other times he would make them go in swimming, on the dusty floor, and they would swim all over it in their best clothes, and would think they were in the river. There were some people who did not believe in the professor, or the boys either. One of these people was an officer of the army who was staying a while in the Boy's Town, and perhaps had something to do with recruiting troops for the Mexican War. He came to the lecture one night, and remained with others who lingered after it was over to speak with the professor. My boy was there with his father, and it seemed to him that the officer smiled mockingly at the professor; angry words passed, and then the officer struck out at the professor. In an instant the professor put up both his fists; they flashed towards the officer's forehead, and the officer tumbled backwards. The boy could hardly believe it had happened. It seemed unreal, and of the dreamlike quality that so many facts in a child's bewildered life are of.