Nevertheless, in order to bolster his claim for the antiquity of the "Vedic horse (as) a native Indian breed", he connects this dead horse with the R… - Michael Witzel

There is the following direct statement contained in the (admittedly much later) BSS, 18.44:397.9 sqq which has once again been over-looked, not having been translated yet: ‘Ayu went eastwards. His (people) are the Kuru-PañcAla and the KASI-Videha. This is the Ayava (migration). (His other people) stayed at home in the West. His people are the GAndhArI, ParSu and AraTTa. This is the AmAvasava (group)’.

This leads to the conclusion that the Indo-Aryan influence, ... was powerful enough from early on to replace local names, in spite of the well-known conservatism of river names. This is especially surprising in the area once occupied by the Indus Civilisation where one would have expected the survival of older names, as has been the case in Europe and the Near East. At the least, one would expect a palimpsest, as found in New England with the name of the state of Massachussetts next to the Charles river, formerly called the Massachussetts river, and such new adaptations as Stony Brook, Muddy Creek, Red River, etc., next to the adaptations of Indian names such as the Mississippi and the Missouri.

The entire book 7 is thus a snapshot o f history: the incursion o f the Bharata into the Panjab from across the Sindhu, and their battle with the “Five Peoples” and the Püru.