Note 313 — Chapter I

“He [Eratosthenes] says that if the extent of the Atlantic Ocean were not an obstacle, we might easily pass by sea from Iberia to India, still keeping in the same parallel, the remaining portion of which parallel ... occupies more than a third of the whole circle.... But it is quite possible that in the temperate zone there may be two or even more habitable earths οἰκουμένας, especially near the circle of latitude which is drawn through Athens and the Atlantic ocean.” (Strabo, Geogr., i. 4, § 6.)