In the concluding portion of the Uttara or Supplemental Book, the descendants of Rama and his brothers are described as the founders of the great cities and kingdoms which flourished in Western India in the fourth and fifth centuries before the Christian Era. Bharat had two sons, Taksha and Pushkala. The former founded Taksha-sila, to the east of the Indus, and known to Alexander and the Greeks as Taxila.