"In 1 Enoch 74:2, Enoch writes the instructions of the angel Uriel regarding the secrets of heavenly bodies and their movements. M. Knibb, The Ethiopic Book of Enoch: A New Edition in the Light of the Aramaic Dead Sea Fragments (2 vols; Oxford: Clarendon Press, 1978) 2.173. Adler draws the reader's attention to an interesting passage from M. Glycas which refers to Uriel's instruction to Seth in a manner similar to Uriel's revelation of the calendarical and astronomical secrets to Enoch in the Astronomical Book of 1 Enoch. "It is said that the angel stationed among the stars, that is the divine Uriel, descended to Seth and then to Enoch and taught them the distinctions between hours, months, seasons, and years." Adler, Time Immemorial: Archaic History and Its Sources in Christian Chronography from Julius Africanus to George Syncellus, 105. For the Greek text see: Michaelis Glycae Annales (ed. I. Bekker; CSHB; Bonn; Weber, 1836) 228." - http://www.marquette.edu/maqom/giants.html#fn19___