Histories

But Darius, passing over the Karadeniz Bogazi (strait), Istanbul, Marmara, Turkey, AsiaBosporus on the floating bridge of ships, journeyed through Thrace (region (general)), EuropeThrace to the sources of the Tearus river, where he camped for three days.

The Tearus is said by those living on it to be the best river of all for purposes of healing, especially for healing mange in men and horses. Its springs are thirty-eight in number, some cold and some hot, all flowing from the same rock.