"Among more recent attempts, motivated explicitly by the desire to counter the increasing skepticism regarding the Aryan invasion theory, the most precise endeavour to show up an explicit mention of the invasion turns out to be based on mistranslation... In fact, the meaning of the sentence is really quite straightforward, and doesn’t require supposing a lot of unexpressed subjects: “Ayu went east, his is the Yamuna-Ganga region”, while “Amavasu went west, his is Afghanistan, Parshu and West Panjab”. Though the then location of “Parshu” (Persia?) is hard to decide, it is definitely a western country, along with the two others named, western from the viewpoint of a people settled near the Saraswati river in what is now Haryana. Far from attesting an eastward movement into India, this text actually speaks of a westward movement towards Central Asia, coupled with a symmetrical eastward movement from India’s demographic centre around the Saraswati basin into the Ganga basin. The fact that a world-class specialist has to content himself with a late text like the Baudhayana Shrauta Sutra, and that he has to twist its meaning this much in order to get an invasionist story out of it, suggests that harvesting invasionist information in the oldest literature is very difficult indeed."
January 1, 1970
https://en.wikiquote.org/wiki/Baudhayana_Shrauta_Sutra