But we come now to nations as to which there is a more general agreement among writers. Where the chain of Emodus[309] rises, the nations of India begin, which borders not only on the Eastern sea, but on the Southern as well, which we have already mentioned[310] as being called the Indian Ocean. That part which faces the east runs in a straight line a distance of eighteen hundred and seventy-five miles until it comes to a bend, at which the Indian Ocean begins. Here it takes a turn to the south, and continues to run in that direction a distance of two thousand four hundred and seventy-five miles, according to Eratosthenes, as far as the river Indus, the boundary of India on the west.[311] Many authors have represented the entire length of the Indian coast as being forty days’ and nights’ sail, and as being, from north to south, two thousand eight hundred and fifty miles. Agrippa states its length to be three thousand three hundred miles, and its breadth, two thousand three hundred. Posidonius has given its measurement as lying from north-east to south-east, placing it opposite to Gaul, of which country he has given the measurement as lying from north-west to south-west; making the whole of India to lie due west of Gaul. Hence, as he has shewn by undoubted proofs, India lying opposite to Gaul must be refreshed by the blowing of that wind,[312] and derive its salubrity therefrom. In this region, the appearance of the heavens is totally changed, and quite different is the rising of the stars; there are two summers in the year, and two harvests, while the winter intervenes between them during the time that the Etesian[313] winds are blowing: during our winter too, they enjoy light breezes, and their seas are navigable. In this country there are nations and cities which would be found to be quite innumerable, if a person should attempt to enumerate them. For it has been explored not only by the arms of Alexander the Great and of the kings who succeeded him, by Seleucus and Antiochus, who sailed round even to the Caspian and Hyrcanian Sea, and by Patrocles,[314] the admiral of their fleet, but has been treated of by several other Greek writers who resided at the courts of Indian kings, such, for instance, as Megasthenes, and by Dionysius, who was sent thither by Philadelphus, expressly for the purpose: all of whom have enlarged upon the power and vast resources of these nations. Still, however, there is no possibility of being rigorously exact, so different are the accounts given, and often of a nature so incredible. The followers of Alexander the Great have stated in their writings, that there were no less than five thousand cities in that portion of India which they vanquished by force of arms, not one of which was smaller than that of Cos;[315] that its nations were eight in number, that India forms one-third of the whole earth, and that its populations are innumerable—a thing which is