ZARADRUS(Ζαράδρος, Ptol. 7.1.27), the upper portion of the Hyphasis, the most eastern of the five rivers of the Panjáb, now the Sutledge. There is some doubt about the orthography of this name, which in some editions is written Zadrades. There can be no doubt that in either case it is derived from the Sanscrit name Satadru, and that it is the same as the Hesydrus of Pliny (Plin. Nat. 6.17. s. 21).
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