Chief among these are the Hermetic books or writings attributed to Hermes the Egyptian or Trismegistus. “Under this name,” wrote Steinschneider in 1906, “there exists in many languages a literature, for the most part superstitious, which seems to have not yet been treated in its totality.”[1289] The Egyptian god Thoth or Tehuti, known in Greek as Θωύθ, Θώθ, and Τάτ, was identified with Hermes, and the epithet “thrice-great” is also derived from the Egyptian _aā aā_, “the great Great.” Citations of works ascribed to this Hermes Trismegistus can be traced back as early as the first century of our era.[1290] He is also mentioned or quoted by various church fathers from Athenagoras to Augustine and often figures in the magical papyri. The historian Ammianus Marcellinus[1291] in the fourth century ranks him with the great sages of the past such as Pythagoras, Socrates, and Apollonius of Tyana. Our two chief descriptions of the Hermetic books from the period of the Roman Empire are found in the _Stromata_[1292] of the Christian Clement of Alexandria (c. 150-c. 220 A. D.) and in the _De mysteriis_[1293] ascribed to the Neo-Platonist Iamblichus (died about 330 A. D.). Clement speaks of forty-two books by Hermes which are regarded as “indispensable.” Of these ten are called “Hieratic” and deal with the laws, the gods, and the training of the priests. Ten others detail the sacrifices, prayers, processions, festivals, and other rites of Egyptian worship. Two contain hymns to the gods and rules for the king. Six are medical, “treating of the structure of the body and of diseases and instruments and medicines and about the eyes and the last about women.” Four are astronomical or astrological, and the remaining ten deal with cosmography and geography or with the equipment of the priests and the paraphernalia of the sacred rites. Clement does not say so, but from his brief summary one can imagine how full these volumes probably were of occult virtues of natural substances, of magical procedure, and of intimate relations and interactions between nature, stars, and spirits. Iamblichus repeats the statement of Seleucus that Hermes wrote twenty thousand volumes and the assertion of Manetho that there were 36,525 books, a number doubtless connected with the supposed length of the year, three hundred and sixty-five and one-quarter days.[1294] Iamblichus adds that Hermes wrote one hundred treatises on the ethereal gods and one thousand concerning the celestial gods.[1295] He is aware, however, that most books attributed to Hermes were not really composed by him, since in other passages he speaks of “the books which are circulated under the name of Hermes,”[1296] and explains that “our ancestors ... inscribed all their own writings with the name of Hermes,”[1297] thus dedicating them to him as the patron deity of language and theology. By the time of Iamblichus these books had been translated from the Egyptian tongue into Greek.