But the genealogies had a deeper significance. Israel was Jehovah's chosen people, His son, to whom special privileges were guaranteed by solemn covenant. A man's claim to share in this covenant depended on his genuine Israelite descent, and the proof of such descent was an authentic genealogy. In these chapters the chronicler has taken infinite pains to collect pedigrees from all available sources and to construct a complete set of genealogies exhibiting the lines of descent of the families of Israel. His interest in this research was not merely antiquarian: he was investigating matters of the greatest social and religious importance to all the members of the Jewish community, and especially to his colleagues and friends in the Temple service. These chapters, which seem to us so dry and useless, were probably regarded by the chronicler's contemporaries as the most important part of his work. The preservation or discovery of a genealogy was almost a matter of life and death. Witness the episode in Ezra and Nehemiah(57): "And of the priests: the children of Hobaiah, the children of Hakkoz, the children of Barzillai, which took a wife of the daughters of Barzillai the Gileadite, and was called after their name. These sought their register among those that were reckoned by genealogy, but it was not found; therefore they were deemed polluted and put from the priesthood. And the governor said unto them that they should not eat of the most holy things, till there stood up a priest with Urim and Thummim." Cases like these would stimulate our author's enthusiasm. As he turned over dusty receptacles, and unrolled frayed parchments, and painfully deciphered crabbed and faded script, he would be excited by the hope of discovering some mislaid genealogy that would restore outcasts to their full status and privileges as Israelites and priests. Doubtless he had already acquired in some measure the subtle exegesis and minute casuistry that were the glory of later Rabbinism. Ingenious interpretation of obscure writing or the happy emendation of half-obliterated words might lend opportune aid in the recovery of a genealogy. On the other hand, there were vested interests ready to protest against the too easy acceptance of new claims. The priestly families of undoubted descent from Aaron would not thank a chronicler for reviving lapsed rights to a share in the offices and revenues of the Temple. This part of our author's task was as delicate as it was important.