In the accounts given by the Greeks of the worship of these nations, in spite of much agreement, points are found at variance with the rules of the Avesta, and as a fact certain distinctions did prevail. The doctrine had arisen in the East, and the priesthood there was in possession of the purer and more orthodox dogma. If Persia and Media did not follow this in all respects, it was convenient to be silent about the differences in the time of the Achæmenids, or if any one desired to brand them, to mark out the Median Ragha as the seat of heresy, rather than Pasargadæ or Persepolis. This explanation it is true is somewhat far fetched. The result that the religion known by the name of Zarathrustra had reached the Medes and Persians by the middle of the eighth century B.C. is in no way weakened by it, though the assumption that at this period written documents of this doctrine were in existence, and that the book of the law of which we have fragments arose in the first half of the eighth century B.C., is rendered more doubtful if such a mode of interpretation is admitted. The forms of language preserved in the Avesta have not survived with sufficient distinctness to assist us in fixing the time at which it was written down. As was shown above (p. 65), the manuscripts date from the later period of the Sassanids; they are written in the later East-Pehlevi character, and at a time when the old forms must have undergone changes owing to the language which had come into use in the mean time, and can in fact be proved to have undergone them. The old sounds are obviously modified and confounded,[176] so that the language of the Avesta, when compared with that of the inscriptions of the Achæmenids, exhibits forms less ancient and fixed, and indeed in some cases it is more recent than the language of the legends of the Græco-Bactrian coins (p. 27). Nor can any certain conclusions be drawn from the condition of political and social life shown in the Avesta. It is only the splendour of regal power in general, the old sacrificers, heroes, and kings that are extolled in it; a sacrificial prayer to Mithra speaks of the abode of the Arians, where "horse-guiding rulers govern noble troops;" for the rest we hear only of lords of villages, of tribes or cantons, and provinces, and of three orders into which the people are divided. The Vendidad, it is true, reckons by winters and nights, not by years and days; the amount of fines and punishments is computed in animals, goats, sheep, oxen, horses, or camels; and these facts point to an ancient period, but they may have been handed down by tradition. We also hear of the value of these animals and of money (_shaeta_).[177] This is the less surprising as the Vendidad speaks of palaces and pillars and various works of art, and mentions smelting-ovens and even ovens for making glass. We found that the Greek princes of Bactria struck square coins, which they would not have done