Zend[37] language of the later Zoroastrian faith had been rediscovered, and with the aid of it, de Sacy had been able to decipher the Pehlevi[38] inscriptions. Now only the older Persian inscriptions of the Achaemenian kings awaited interpretation. In 1802 G. Friedrich Grotefend, of Hanover, a schoolmaster by profession, entered the field, and by the following process of reasoning he became the pioneer discoverer of part of the Persian cuneiform alphabet, and the first decipherer of a complete cuneiform inscription. Old writers had provided him with the all-important information that the palaces of Persepolis, amid the ruins of which so many of these cuneiform inscriptions had been found, were built by the Achaemenian kings. The Pehlevi inscriptions moreover, which had also been found on this site and had been deciphered by de Sacy, led him to expect that the cuneiform inscriptions would contain something analogous. Grotefend had already satisfied himself that the inscriptions read from left to right, and selecting two short inscriptions, one engraved on a gate-post of a building on the second palace-terrace, and the other engraved on the wall of a building on the third palace-terrace at Persepolis, he commenced his successful investigations. Both inscriptions contained the group of signs which Münter had already rightly inferred represented “king,” though what was the Persian for “king” remained as yet unknown, the only difference being that in Inscription I “king” was preceded by a group of signs which may be conveniently designated “X,” while in Inscription II “king” is preceded by a group of signs which may be called “Y,” and that moreover in Inscription II “X” and the word for “king” following it occurred after the “Y” + “king.” In I on the other hand “X” + “king” was followed by another group of signs which may be labelled “Z,” without however the usual accompanying “king.” Thus I reads “X” + king......... “Z”......... And II reads “Y” + king......... “X” + king.