According to the loose reckoning, that a ship could sail with a fair wind 1000 stadia, or 125 miles, in the revolution of a day and night, Diodorus Siculus computes ten days from the Palus Maeotis to Rhodes, and four days from Rhodes to Alexandria. The navigation of the Nile, from Alexandria to Syene, under the tropic of Cancer, required, as it was against the stream, ten days more. Diodor. Sicul. tom. i. 1. iii. [c. 33] p. 200, edit. Wesseling. He might, without much impropriety, measure the extreme heat from the verge of the torrid zone; but he speaks of the Moeotis, in the 47th degree of northern latitude, as if it lay within the polar circle.