Can we go beyond the result thus gained by our investigation?--that the doctrine of Zoroaster flourished in Eastern Iran about 800 B.C., and advanced towards the West from this period; may we assume that at this date it was already in possession of written monuments, and even that the fragments of the Avesta which still remain were in existence then? We must first answer the question whether the use of writing in Iran, especially in the East, goes back so far. According to the statements of Herodotus, the West of Iran was not only in possession of the art of writing by the year 700 B.C., but made considerable use of it. He tells us that Deioces required complaints to be sent in to him in writing, and gave out his decisions also in writing. If processes at law were conducted in writing in Media about the year 700 B.C., it cannot be surprising that Herodotus should also inform us that letters passed between Media and Persia about the year 560 B.C.[173] We learn from the Hebrew Scriptures that when Cyrus allowed the Jews, whom Nebuchadnezzar had removed to Babylon, to return to their homes, he gave his permission for the restoration of the temple in writing. This document was afterwards discovered in the archives of Ecbatana.[174] We know it for a fact that Darius I. gave his orders to the satraps in writing, and we are acquainted with the seal of Darius by which they were authenticated. The oldest inscriptions which have come down to us from the Achæmenids, not to mention a seal of Cyrus from Senkereh, belong, if not to Cyrus himself, to Darius, and begin about the last quarter of the sixth century B.C. It is the cuneiform writing of Assyria and Babylon which forms the basis of the writing in these inscriptions, but with considerable alterations. The highly complicated syllabarium of the Eastern Semites is reduced to a phonetic system; we might almost say to an alphabet of about 40 letters. A change of this kind can hardly have been made at one stroke. If it was after they entered into closer combination with Assyria, _i.e._ after their dependence on the king of Asshur, which began with the accession of Tiglath Pilesar II. (745 B.C.), that the Medes became acquainted with the Assyrian system of writing, this must have been completely mastered before it could be abbreviated and altered, as it was altered by the Medes, whose changes were adopted by the Persians. The cuneiform writing of Western Iran, as we find it in the inscriptions of Darius, can therefore hardly have been established before the year 600 B.C. However this may be, the facts mentioned prove that the writing of the Assyrians in the seventh century B.C. was not unknown in the West of Iran. This would therefore have passed into the East of Iran in its original or simplified form, either at some earlier period, or when the East came under the dominion of the Achæmenids. But it did not, and this is a plain proof that the East, when the cuneiform writing of the West came