These are the immediate effects produced by this most extraordinary substance. There are others, however, still more singular, which have attracted the attention of travellers, and become the objects of intense curiosity. These are of a nature unknown in connection with any other substance, and have formed the basis of numerous marvellous narrations, that have astonished even the incredulous. Those who have seen the fearful symptoms betrayed during delirium tremens, and have heard the sufferers declare that they saw before them genii, fairies, devils, know how the senses may become the source of delusion, and hence may judge to _what_ a disordered state of the intellect may lead. When the brain has once become disordered by the use of the narcotic hemp, it becomes ever afterwards liable to hallucinations and delusions, unlike those produced by anything else, save intoxicating liquours after an attack of delirium tremens. The mind then believes that it sees visions, and beholds beings with whom it can converse. The phenomena gradually develop themselves, until illusions take the place of realities, and hold firm possession of the mind, which would seem on all other points to be healthy and vigorous, but on this point, insane. So firm and so fixed becomes the belief, that neither argument convinces, nor ridicule shakes, the individual from his faith, in which a prejudiced or too credulous nature confirms him but the more. The Arabs, especially those of Egypt, are exceedingly superstitious, and there is scarce a person, even among the better informed, who does not believe in the existence of genii. According to their belief there are three species of intelligent beings, namely, angels, who were created of light, genii, who were created of fire, and men, created of earth. The prevailing opinion is that Sheytans (devils) are rebellious genii. It is said that God created the genii two thousand years before Adam, and that there are believers and infidels among them as among men. It is held that they are aerial animals with transparent bodies, which can assume any form. That they are subject to death, but live many ages. The following are traditions of the Prophet concerning them. The genii are of various shapes, having the forms of serpents, scorpions, lions, wolves, jackals, &c. They are of three kinds, one on the land, one in the sea, one in the air. They consist of forty troops, each troop consisting of six hundred thousand. They are of three sorts, one has wings and fly; another, are snakes and dogs; and the third move about from place to place like men. Domestic snakes on the same authority, are asserted to be genii. If serpents or scorpions intrude themselves upon the faithful at prayers, the Prophet orders that they be killed, but on other occasions, first to admonish them to depart, and then if they remained to kill them. It is related that Aisheeh, the prophet’s wife, having killed a serpent in her chamber,