Note 1464 — Chapter XII · REGIONAL GEOGRAPHY (continued 2)

De imag. mundi, I, 22 (from Isidore, Etym., XIV, 8) mentions the Rhipaean range. See Benl, Frühere und spätere Hypothesen, 1905, pp. 10–12. This doctrine may perhaps be traced back to Babylonian geography, according to which the high mountains at the headwaters of the Tigris and Euphrates were thought to bound the earth on the north. See Lutz, Geographical Studies, 1924, pp. 167–168.