"Second Sight: A study of Natural and Induced Clairvoyance" by Sepharial Walter Gorn Old was a 19th-century astrologer, who used the nom-de-plume "Sepharial", after an angel in the apocryphal Book of Enoch. In this book, the author endeavored to indicate the nature of the faculty of Second Sight or Clairvoyance, the means of its development, the use of suitable media or agents for this purpose, and the kind of results that may be expected to follow the regulated effort in this direction. Written as an educational text, this book is based on the latest science at the time it was released.
