delusion, yet unable to resist the horror of the impression. When she was newly recovered, I had the curiosity to question her, as I have interrogated others, respecting the forms of the demons with which she had been claimed; but I never could obtain any other account, than that they were very small, very much deformed, and had horns and claws like the imps of our terrific modern romances.” To this illustration of the general origin of the figures of demoniacal illusions, I might observe, that, in the case of a patient suffering under _delirium tremens_, which came under my notice, the devils who flitted around his bed were described to me as exactly like the forms that he had recently seen exhibited on the stage in the popular drama of Don Giovanni. With the view of illustrating other accounts of apparitions, I shall now return to the doctrine of demonology which was once taught. Although the leading tenets of this occult science may be traced to the Jews and early Christians, yet they were matured by our early communication with the Moors of Spain, who were the chief philosophers of the dark ages, and between whom and the natives of France and Italy, a great communication subsisted. Toledo, Seville, and Salamanca, became the greatest schools of magic. At the latter city, prelections on the black art were, from a consistent regard to the solemnity of the subject, delivered within the walls of a vast and gloomy cavern. The schoolmen taught, that all knowledge might be obtained from the assistance of the fallen angels. They were skilled in the abstract sciences, in the knowledge of precious stones, in alchymy, in the various languages of mankind and of the lower animals, in the belles lettres, in moral philosophy, pneumatology, divinity, magic, history, and prophecy. They could controul the winds, the waters, and the influence of the stars; they could raise earthquakes, induce diseases, or cure them, accomplish all vast mechanical undertakings, and release souls out of purgatory. They could influence the passions of the mind—procure the reconciliation of friends or foes—engender mutual discord—induce mania and melancholy— or direct the force and objects of the sexual affections.