[441] Ritter, "Erdkunde," 8, 153, 183, 491, 561.[442] Chanikof, in Spiegel, "Eran," 1, 556.[443] "Farvardin Yasht," 147.BOOK VIII.THE EMPIRE OF THE MEDES AND PERSIANS.THE EMPIRE OF THE MEDESAND PERSIANS.CHAPTER I.