The Histories · 4.56

Seventh is the Gerros, which parts off from the Borysthenes near about that part of the country where the Borysthenes ceases to be known,—it parts off, I say, in this region and has the same name which this region itself has, namely Gerros; and as it flows to the sea it borders the country of the nomad and that of the Royal Scythians, and runs out into the Hypakyris.

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
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