"Where are the burned fortresses, the arrow heads, weapons, pieces of armour, the smashed chariots and bodies of the invaders and defenders?... Despite the extensive excavations at the largest Harappan sites, there is not a single bit of evidence that can be brought forth as unconditional proof of an armed conquest and the destruction on the supposed scale of the Aryan invasion."
January 1, 1970
https://en.wikiquote.org/wiki/George_F._Dales