Here is my conversation with I-330, which took place in the Ancient House yesterday in the midst of loud noise, among colors which stifled the logical course of my thoughts, red, green, bronze, saffron-yellow, orange colors.... And all the while under the motionless marble smile of that snub-nosed ancient poet. I shall reproduce the conversation word by word, for it seems to me that it may have an enormous and decisive importance for the fate of the United State,--more than that, for the fate of the universe. Besides, reading it, you my unknown readers, may find some justification for me. I-330, without preliminaries, at once threw everything upon my head: "I know that the day after tomorrow the first trial trip of the _Integral_ is to take place. On that day we shall take possession of it." "What! Day after tomorrow?" "Yes. Sit down and don't be upset. We cannot afford to lose a minute. Among the hundreds who were arrested yesterday there are twenty Mephis. To let pass two or three days means that they will perish." I was silent. "As observers on the trial trip they will send electricians, mechanicians, physicians, meteorologists, etc.... At twelve sharp, you must remember this, when the bell rings for dinner we shall remain in the passage, lock them all up in the dining hall, and the _Integral_ will be ours. You realize that it is most necessary, happen what may! The _Integral_ in our hands will be a tool that will help to put an end to everything at once without pain.... Their aeros?... Bah! They would be insignificant mosquitos against a buzzard. And then, if it proves inevitable, we may direct the tubes of the motors downward and by their work alone...." I jumped up. "It is inconceivable! It is absurd! Is it not clear to you that what you are contriving is a revolution?" "Yes, a revolution. Why is it absurd?" "Absurd? because a revolution is impossible! Because _our_ (I speak for myself and for you), our revolution was the last one. No other revolutions may occur. Everybody knows that." A mocking, sharp triangle of brows. "My dear, you are a mathematician, are you not? More than that, a philosopher-mathematician? Well then, name the last number!" "What is ... I ... I cannot understand, which _last_?" "The last one, the highest, the largest." "But I-330, it is absurd! Since the number of numbers is infinite, how can there be a last one?" "And why then do you think there is a _last_ revolution? There is no last revolution, their number is infinite.... The 'last one' is a children's story. Children are afraid of the infinite, and it is necessary that children should not be frightened, so that they may sleep through the night." "But what is the use, what is the use of it all? For the sake of the Well-Doer! What is the use since all are happy already?" "All right! Even suppose that is so. What further?"