On board the steamer was an elderly man with such a joyful face that if it didn't belie him he must have been the happiest person on earth. In fact, he said he was the happiest; I heard it from his own mouth. He was a Dane, a countryman of mine, and a traveling theatrical producer. His whole company was with him and lay in a large box, for he was the proprietor of a puppet show. He said that his natural cheerfulness had been enlightened by a Polytechnic student, and the experiment had left him completely happy. At first I didn't understand what he meant, but later he explained the whole thing to me, and here is the story.