In the opening verses of Ezra vii. the chronicler gives an epitome of the genealogy of Ezra, passing over several generations, but leading up to Aaron. Ezra, then, could claim a high birth. He was a born priest of the select family of Zadok, but not of the later house of high-priests. Therefore the privileges which are assigned to that house in the Pentateuch cannot be accounted for by ascribing ignoble motives of nepotism to its publisher. Though Ezra is named "The Priest," he is more familiarly known to us as "The Scribe." The chronicler calls him "a ready scribe" (or, a scribe skilful) "in the law of Moses, which the Lord God of Israel had given." Originally the title "Scribe" was used for town recorders and registrars of the census. Under the later kings of Judah, persons bearing this name were attached to the court as the writers and custodians of state documents. But these are all quite distinct from the scribes who appeared after the exile. The scribes of later days were guardians and interpreters of the written Torah, the sacred law. They appeared with the publication and adoption of the Pentateuch. They not only studied and taught this complete law; they interpreted and applied its precepts. In so doing they had to pronounce judgments of their own. Inasmuch as changing circumstances necessarily required modifications in rules of justice, while The Law could not be altered after Ezra's day, great ingenuity was required to reconcile the old law with the new decisions. Thus arose sophistical casuistry. Then in "fencing" The Law the scribes added precepts of their own to prevent men from coming near the danger of transgression.