"The opinions of best researchers in the matter of the age of the Ṛgveda differed not by a few centuries but by a few thousands of years. Now it is clear that the presumption of 200 years for each of the literary epochs in the birth of the Veda is purely arbitrary... it was strangely forgotten on how weak a footing the prevailing view actually stood."
January 1, 1970
https://en.wikiquote.org/wiki/Timeline_of_Hindu_texts