"You see," said Watson, "we did not know what suggestion was given the patient; these post-hypnotic suggestions are peculiar in their action upon some sensitives. If, as it is fair to suppose, this man was ordered to sleep, he should in the natural course of events sleep for a number of hours and then awake, after passing from the hypnotic sleep to the normal sleep; but we know very little of the effect on some nervous systems of post-hypnotic suggestions. Another thing, in many cases the patient will not waken or cannot be wakened except by the person who put him to sleep. The reason for this is plain enough. Part of the effect on the mind of hypnotic suggestion is due entirely to sleep. The skilled hypnotist commands one of his sensitives to sleep under certain conditions. The sensitive expects to be awakened by the same voice and in the same way, and habit and association have fixed in his mind certain conditions which he associates with the order to awake. There is no doubt whatever that Mr. Herrick heard what we were saying when we spoke to him in a loud voice, but he heard it without understanding, much as a person in a sleepy condition hears noises about him without trying to comprehend them. It is undoubtedly true that the man who put Herrick to sleep could have wakened him in a moment, while we, with all our knowledge and experience, were unable to make his brain regain its normal condition. We decided to let him sleep; and if, at the end of a few hours, he did not regain consciousness, we would try again what we could do to assist him, of course watching the heart in the meanwhile and using nitro-glycerin or strychnia if indicated. "At that moment Herrick suddenly spoke, at first huskily and then in a loud, clear voice, shouting, 'Yes, yes, I hear you; I am awake.' Then he sat up, asking in a dazed way, 'Where am I? What does this mean?'" "As he did so the old-fashioned clock in the hall struck the hour of seven." The queerest part of this story is suggested by a letter received from Dr. Morse the next day, which read as follows: DEAR WATSON: You asked me to write you about the injured man, and I do so now to tell you he is dead. He died a minute or two before seven o'clock last evening; I know the hour exactly, because I was watching him at the time, and for some moments he had been whispering and muttering to himself, but all I could catch was something about, "I withdraw my command;" when, suddenly raising himself, he shouted, "Wake up, wake up!" and fell back dead just as the clock in the church-yard struck seven. I should be much interested to hear whether his story was true or not. Drop me a line about it when you have time. Very sincerely yours, F. MORSE. STORY OF AN INSANE SAILOR.