The present volume is a sequel to my Orion or Researches into the Antiquity of the Vedas published in 1893. The estimate of Vedic antiquity then generally current amongst Vedic scholars was based on the assignment of arbitrary period of time to the different steata into which the Vedic literature is divided:and it was believedthat oldest of these strata could not, at the best, be older than 2400B.C .