Note 331 — BOOK VI. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST, OR FORMERLY EXISTED.
John Bostock translation
It does not appear that this river has been identified. In most of the editions it is called Hesidrus; but, as Sillig observes, there was a town of India, near the Indus, called Sydros, which probably received its name from this river.