From Caf to Caf; which a more rational geography would interpret, from Imaus, perhaps, to Mount Atlas. According to the religious philosophy of the Mahometans, the basis of Mount Caf is an emerald, whose reflection produces the azure of the sky. The mountain is endowed with a sensitive action in its roots or nerves; and their vibration, at the command of God, is the cause of earthquakes. (D'Herbelot, p. 230, 231.)