Between the witch and the conjurer a wide gulf is fixed. The conjurer coerces the Devil, against his infernal will, by prayers and the invocation of God's Holy Name; the witch concludes with him a business agreement, bartering her body, soul, and obedience for certain more or less illusory promises. The conjurer is almost invariably beneficent, the witch usually malignant, though the White Witch exercises her powers only for good, if sometimes with a certain mischievousness, while the Grey Witch does good or evil as the fancy takes her, with a certain bias towards evil. The wizard, again, though often confused with the male-witch, is in reality a practitioner of great distinction, possessing supernatural powers of his own attaining, and, like the magician, constraining the Devil rather than serving him. He also is capable of useful public service, so much so indeed that Melton, in his "Astrologastra," published in 1620, includes what may pass as a Post Office Directory of the wizards of London. He enumerates six of importance, some by name, as Dr. Forman or "Young Master Olive in Turnbull Street," others by vaguer designations, as "the cunning man of the Bankside" or "the chirurgeon with the bag-pipe cheek." He includes one woman in the list, probably a White Witch. The Diviners, or peerers into the future, form yet another sub-section of dabblers in the supernatural--and one which numbers very many practitioners even in our own day. Naturally enough, seeing that the desire to influence the future is the obvious corollary to that of knowing it, the part of diviner was more often than not doubled with that of witch or sorcerer. Divination is an art of the most complicated, boasting almost as many branches as medicine itself, each with its select band of practitioners. Different nations, again, favoured different methods of divining--thus the Hebrews placed most confidence in Urim and Thummim; the Greeks were famous for axinomancy, the machinery for which consisted of an axe poised upon a slate or otherwise handled. This method was as apt for present as for future needs, being especially potent in the discovery of criminals. Crime detection by divination has been--and remains--greatly favoured in the East. The Hindus, in particular, place greater reliance upon it than upon the more usual methods of our Occidental police, and many stories are told of the successes achieved by their practitioners. Nor is this surprising in cases where the diviner shows such shrewd knowledge of human nature as in that, oft-quoted, whereby all those under suspicion of a theft are ranged in a row and presented with mouthfuls of grain, with the assurance that the guilty man alone will be unable to swallow it--a phenomenon which nearly always does occur if the thief be among those present--and not infrequently when he is not! This and similar stories, though scarcely falling under the heading of divination