This is the first volume of three of G.R.S. Mead's comprehensive survey of the literature attributed to the legendary Egyptian sage, Hermes Trismegistus. Chapters include: The Remains of the Trismegistic Literature; The History of the Evolution of Opinion; Thoth the Master of Wisdom; The Popular Theurgic Hermes-Cult in the Greek Magic Papyri; The Main Source of the Trismegistic Literature According to Manetho, High Priest of Egypt; An Egyptian Prototype of the Main Features of the Poemandres’ Cosmogony; The Myth of Man in the Mysteries; Philo of Alexandria and the Hellenistic Theology; Plutarch: Concerning the Mysteries of Isis and Osiris, and more.