 Among the other philosophical schools and doctrines quoted in the encyclopedia an important role is played by hermetism (the religion of the philosophical elite in Ancient Egypt, founded by Hermes Trismegistus), as in Epistle 3 On astronomy and, more broadly, in Epistle 52 (Marquet 1973, 1988). Ancient theories on the movements of the stars will finally evolve in Epistle 36 On cycles and revolutions into that which, following Cumont, G. de Callataÿ (1996, 36–37) has defined as a “fatalisme astral.”