[The horizon of the Avesta] “is according to Burrow, wholly eastern and therefore certainly earlier than the westward migrations of the Iranian tribe… - Gherardo Gnoli

Given its very Oriental horizon, this list must be pre-Achaemenid; on the other hand, the remarkable extendedness of the territories concerned recommends situating them in a period much later than the Zoroastrian origins. (…) one or several centuries later than Zarathuštra’s preaching.

[Likewise, in later Greek tradition, Ariane] “is the Greek name which doubtless reflects an older Iranian tradition that designated with an equivalent form the regions of eastern Iran lying mostly south, and not north, of the Hindukus. It is clear how important this information is in our research as a whole.” ...

[the airyo-Sayana refers to] “the vast region that stretches southward from the Hindukus,” ... “from the southern slopes of the great mountain chains towards the valleys of the rivers that flow south, like the Hilmand…” “there is a substantial uniformity in the geographical horizon between Yt.XIX and Yt.X ... and the same can be said for Vd.I … these Avestan texts which contain in different forms, and for different purposes, items of information that are useful for historical geography give a fairly uniform picture: eastern Iran, with a certain prevalence of the countries reaching upto the southern slopes of the Hindukus.” ...