The arguments are drawn from the regional toponymy as it was still known to Ptolemy: the river Drəjā (or rather Darəjī) is identified with Ptolemy’s Dargoidos and with present-day Kokcha; the Vaŋhvi Dāityā is identified with the Ochos, present-day Daryā-i Panj. The ford on the Dāityā where Zoroaster had his first vision, described in the Pahlavi sources which derive from the Spand Nask, corresponds to the present Samti ford on the Darya-i Panj. In an Annex, it is proposed that the toponym Ēw-tāg associated with the Daitya in the Pahlavi texts should not be corrected into *Naw..tag and has nothing to do with Nautaka, a Sogdian region mentioned by the historians of Alexander. The name Nautaka appears to reflect Old Ir. *nawa..tāka “the nine watercourses”, and corresponds to the upper basin of the Kashka-daryã.