The early theory of the art of foretelling by means of the stars, and casting horoscopes, was as follows: The seven planets then known, including the Sun, with the twelve figures of the Zodiac, comprised the astrological system. Each unit or body or nation was supposed to be governed or influenced by a certain star or constellation, and this power extended to all things connected with the person or nation. Thus, Saturn was supposed to influence life, sciences, and buildings; Jupiter—honour, wishes, and wealth; Mars—wars, persons, marriages, and quarrels; the Sun—hope, gain, and happiness; Venus—love and friendship; Mercury—fear, disease, debts, and commerce; the Moon—robberies, wounds, and dreams. The intrinsic quality was denoted by the planet. The Sun was regarded as favourable; Saturn, cold; Jupiter, temperate; Mars, ardent; Venus, fruitful; Mercury, inconstant; the Moon, melancholy. The days, colours, and metals also came under the same influences. 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.