How to Read the Crystal is a concise manual of crystal-gazing, presenting the practice not as mere curiosity but as a disciplined art of perception. Sepharial explains the selection and preparation of the crystal, the conditions of light, posture, and mental composure, and the interpretation of visions arising within the reflective surface. Written in the lucid, instructive prose typical of early twentieth-century occult handbooks, the book belongs to the era's wider revival of esoteric sciences, alongside Theosophy, astrology, psychical research, and practical divination. Sepharial, the pen name of Walter Gorn Old, was one of the most influential popularizers of astrology and occult technique in fin-de-siècle and Edwardian Britain. Associated with Theosophical circles and deeply interested in correspondences between mind, symbol, and cosmos, he wrote for readers seeking usable methods rather than abstract speculation. His background in astrology and clairvoyant traditions informs the book's careful attention to temperament, concentration, and symbolic vision. Readers interested in divination, Western esotericism, or the history of occult practice will find this work valuable. It is best approached as both historical document and practical guide, revealing how disciplined imagination became, for Sepharial, an instrument of knowledge.