The English astrologer and mystic Robert Fludd was known for his writings about metaphysical knowledge and astrology, which he illustrated with startlingly-beautiful engravings. This image from the second volume of his masterwork, the Utriusque Cosmi (1619-1621), shows a wheel, with the Ape of Nature at the center, and man at the top. The wheel is divided into seven sections, all representing different kinds of divination, including prophecy, the art of memory, and palmistry. Young magicians studying up on this last divinatory science, take note: don't mix up the lines on your instructor's hand, or you may just predict she died the previous Tuesday, as Harry did.
