i.e. throwing a shadow only one way at noon,—said of those who live north and south of the tropics, while those who live in the tropics cast a shadow sometimes north, sometimes south, vide Strabo ii. 5. § 43.  It was “incredible” to Herodotus that Necho’s Phœnician mariners, in their circumnavigation of Africa, had “the sun on their right hand.”  Her. iv. 42.