(Πυρετός/Pyretós). The easternmost left-bank tributary of the Ister  (Danube), thus corresponding to the modern River Prut. Herodotus, the only ancient author to mention the P., considers it the most important of the Danube's tributaries because of its enormous flow (Hdt. 4,48). Some 830 km long, it rises in the Carpathian mountains and flows across regions that in Antiquity were counted as parts of Scythia (there called Πόρατα/Pórata; Scythae).
H. Treidler, s. v. P. (3), RE 24, 19-22
TIR L 35 Romula, 1969, 60.