My manner was so earnest and impressive that Mr. Gilbert was constrained to follow me, and we went into a small room called the smoking-room, but in which people seldom smoked, and closed the door. I immediately began my statement. I told my old friend that I had discovered, by means that I need not explain at present, that he had considered me crazy, and that now the most important object of my life was to set myself right in his eyes. I thereupon gave him the whole history of my invention, and explained the reason of the actions that had appeared to him those of a lunatic. I said nothing about the little incident of that evening. That was a mere accident, and I did not care now to speak of it. Mr. Gilbert listened to me very attentively. "Your wife is here?" he asked, when I had finished. "Yes," I said; "and she will corroborate my story in every item, and no one could ever suspect her of being crazy. I will go and bring her to you." In a few minutes my wife was in the room, had shaken hands with Mr. Gilbert, and had been told of my suspected madness. She turned pale, but smiled. "He did act like a crazy man," she said, "but I never supposed that anybody would think him one." And tears came into her eyes. "And now, my dear," said I, "perhaps you will tell Mr. Gilbert how I did all this." And then she told him the story that I had told. Mr. Gilbert looked from the one to the other of us with a troubled air. "Of course I do not doubt either of you, or rather I do not doubt that you believe what you say. All would be right if I could bring myself to credit that such a force as that you speak of can possibly exist." "That is a matter," said I, "which I can easily prove to you by actual demonstration. If you can wait a short time, until my wife and I have had something to eat--for I am nearly famished, and I am sure she must be--I will set your mind at rest upon that point." "I will wait here," said Mr. Gilbert, "and smoke a cigar. Don't hurry yourselves. I shall be glad to have some time to think about what you have told me." When we had finished the dinner, which had been set aside for us, I went upstairs and got my knapsack, and we both joined Mr. Gilbert in the smoking-room. I showed him the little machine, and explained, very briefly, the principle of its construction. I did not give any practical demonstration of its action, because there were people walking about the corridor who might at any moment come into the room; but, looking out of the window, I saw that the night was much clearer. The wind had dissipated the clouds, and the stars were shining brightly. "If you will come up the street with me," said I to Mr. Gilbert, "I will show you how this thing works." "That is just what I want to see," he answered. "I will go with you," said my wife, throwing a shawl over her head. And we started up the street.