Note 403 — Chapter VIII · —Alexander conquers Porus—Builds Nicaea and Boucephala, and reduces the Adrestae, Gesteani, Praesidae, and Gangaridae—Advances to the Cuphites (Beäs), beyond which the army refuses to follow him—He agrees to return, and leaves memorials of his progress

The river reached was the Hyphasis. How Justin came to call it the Cuphites it is difficult to understand. Can he have had in his recollection the Kâbul river, called sometimes by the classical writers the Kuphes, with Kuphet as the stem for the oblique cases, and mistaken it for the river which arrested Alexander’s progress? Like Plutarch, he erroneously supposes that the Macedonian army was confronted with a great host encamped on the opposite bank of the river.