One practice of the temple was of special interest, viz., the incubation sleep, in which dreams were suggested to the patients. In the religion of Babylonia, an important part was played by the mystery of sleep, and the interpretation of dreams; and no doubt from the East the Greeks took over the practice of divination in sleep, for in the AEsculapian cult also, the incubation sleep played a most important role. That it continued in later times is well indicated in the orations of Aristides, the arch-neurasthenic of ancient history, who was a great dreamer of dreams. The oracle of Amphiaraus in Attica sent dreams into the hearts of his consultants. "The priests take the inquirer, and keep him fasting from food for one day, and from wine for three days, to give him perfect spiritual lucidity to absorb the divine communication" (Phillimore's "Apollonius of Tyana," Bk. II, Ch. XXXVII). How incubation sleep was carried into the Christian Church, its association with St. Cosmas and St. Damian and other saints, its practice throughout the Middle Ages, and its continuation to our own time may be read in the careful study of the subject made by Miss Hamilton (now Mrs. Dickens).(18) There are still in parts of Greece and in Asia Minor shrines at which incubation is practiced regularly, and if one may judge from the reports, with as great success as in Epidaurus. At one place in Britain, Christchurch in Monmouthshire, incubation was carried on till the early part of the nineteenth century. Now the profession has come back to the study of dreams,(19) and there are professors as ready to give suggestive interpretations to them, as in the days of Aristides. As usual, Aristotle seems to have said the last word on the subject: "Even scientific physicians tell us that one should pay diligent attention to dreams, and to hold this view is reasonable also for those who are not practitioners but speculative philosophers,"(20) but it is asking too much to think that the Deity would trouble to send dreams to very simple people and to animals, if they were designed in any way to reveal the future. In its struggle with Christianity, Paganism made its last stand in the temples of Asklepios. The miraculous healing of the saints superseded the cures of the heathen god, and it was wise to adopt the useful practice of his temple. (18) Mary Hamilton: Incubation, or the Cure of Disease in Pagan Temples and Christian Churches, London, 1906. (19) Freud: The Interpretation of Dreams, translation of third edition by A. A. Brill, 1913. (20) Aristotle: Parva Naturalia, De divinatione per somnium, Ch. I, Oxford ed., Vol. III, 463 a. HIPPOCRATES AND THE HIPPOCRATIC WRITINGS