The Cambridge History of India, Vol. I: Ancient India v1.c24.191

v1.c24.191

For the reign of Darius (522–486 B.C.) we have documentary evidence of the highest value in the inscriptions executed by that monarch’s command and containing his own statements. From these inscriptions, especially when they are compared one with another, we can trace the general outline of the Persian dominion in Northern and North-western India in the time of Darius, and we can even infer that he annexed the valley of the Indus early in his reign, a conclusion which is confirmed by the testimony of various passages in Herodotus. The three records in stone which require special consideration in this connexion are the following²: