In casting a horoscope, the astronomer had first to observe if the time was propitious, and what planet was dominant in the heavens. Then, by means of calculations and diagrams, he would deduce the consequences from the position and bearing of the stars. The day was divided into four equal parts—the ascendant of the sun, the middle of the sky, the descending of the sun, and the lower part of the sky. These four parts of the day were subdivided into twelve distinct parts, which were called the twelve houses of the sun. It was of the greatest importance in drawing a horoscope to tell exactly in which “house” the star appeared. One can easily trace the connection of the influence attributed to the planets with the old Egyptian and Greek mythologies, and it can hardly be wondered at that the same system should have been brought to bear on medicine.
A favourite method of divination, especially with the sorcerers, was that of gazing into a beryl or crystal. For the proper performance of this ceremony a pure virgin or equally pure youth should be the gazer. The sorcerer, having repeated the necessary charms and adjurations, with the invocation suitable to the spirits he wished to consult, looked into a large beryl or crystal, wherein he saw the answer represented either by types or by figures, and sometimes it is said he might hear the spirit speak to him.
Vallancey states that in the Highlands of Scotland large crystals of somewhat oval shape were kept by the priests to work charms with, and that water poured on them was given to cattle as a preventive of disease. Dr. Dee was a famous conjurer with the crystal in the time of Queen Elizabeth.
Lilly describes these crystals as being the size of an orange, set in silver, surmounted with a cross, and engraved all round with the names of the angels—Raphael, Gabriel, and Uriel.
Among other charms practised was Dactylomancy, which was performed by means of a ring suspended by a thread in the centre of an earthenware or metal pitcher. The ring, which was supposed to have been made under the influence of a certain constellation, was swung from side to side of the vessel, and the sounds it made on touching were taken as predictions and oracles.
The art of divination by fire was called Pyromancy, and was performed by allowing a certain body to burn, the smoke from which, by its density and colour, forecast the future. A favourite medium for consulting this oracle was a donkey’s head roasted on hot coals.
Popular belief in mediæval times attributed anything unusual or beyond its understanding, to magic; so most of the early alchemists were believed to be magicians. Both Albertus Magnus and Roger Bacon were accused of dealing in the black arts, one having to resign his bishopric of Cologne and retire to a monastery, and the other to the Franciscan cells in Paris, to free themselves from the charges of their accusers.
CHAPTER X.
BLACK MAGIC.
Geber, an alchemist of great repute in Arabia, was believed to possess the power of creating gold by magic. He was a man of undoubted learning and a skilful practitioner of his time, yet he was dubbed a sorcerer. He was said to possess all kinds of extraordinary implements; among others, a book of black magic which gave him full power over demons, and a brass idol which spoke oracles. On the day of his death, in 1003, the Evil One is supposed to have carried him off. James Iodoc, an Englishman, achieved considerable notoriety by claiming that he had succeeded in setting the demon in a magic ring. These men should not be confounded with the host of impostors and charlatans who simply preyed on the credulity of the people, but in those days all were judged alike. Most of the great mediæval alchemists dabbled in magic, and all agreed that to obtain the intervention of Satan in human affairs it was necessary to enter into a pact with him. Those who went to this length and became exponents of demonology, or the black art, were initiated with much solemnity.