Against Apion: Further proof from Josephus concerning the exact management of the Jews genealogies

The following is taken from Against Apion Book one sections six and seven. This is a great example of the care Jews took concerning their genealogies.

6. As to the care of writing down the records from the earliest antiquity among the Egyptians and Babylonians; that the priests were intrusted therewith, and employed a philosophical concern about it; that they were the Chaldean priests that did so among the Babylonians; and that the Phoenicians, who were mingled among the Greeks, did especially make use of their letters, both for the common affairs of life, and for the delivering down the history of common transactions, I think I may omit any proof, because all men allow it so to be. But now as to our forefathers, that they took no less care about writing such records, (for I will not say they took greater care than the others I spoke of,) and that they committed that matter to their high priests and to their prophets, and that these records have been written all along down to our own times with the utmost accuracy; nay, if it be not too bold for me to say it, our history will be so written hereafter; - I shall endeavor briefly to inform you.
7. For our forefathers did not only appoint the best of these priests, and those that attended upon the Divine worship, for that design from the beginning, but made provision that the stock of the priests should continue unmixed and pure; for he who is partaker of the priesthood must propagate of a wife of the same nation, without having any regard to money, or any other dignities; but he is to make a scrutiny, and take his wife's genealogy from the ancient tables, and procure many witnesses to it. (7) And this is our practice not only in Judea, but wheresoever any body of men of our nation do live; and even there an exact catalogue of our priests' marriages is kept; I mean at Egypt and at Babylon, or in any other place of the rest of the habitable earth, whithersoever our priests are scattered; for they send to Jerusalem the ancient names of their parents in writing, as well as those of their remoter ancestors, and signify who are the witnesses also. But if any war falls out, such as have fallen out a great many of them already, when Antiochus Epiphanes made an invasion upon our country, as also when Pompey the Great and Quintilius Varus did so also, and principally in the wars that have happened in our own times, those priests that survive them compose new tables of genealogy out of the old records, and examine the circumstances of the women that remain; for still they do not admit of those that have been captives, as suspecting that they had conversation with some foreigners. But what is the strongest argument of our exact management in this matter is what I am now going to say, that we have the names of our high priests from father to son set down in our records for the interval of two thousand years; and if any of these have been transgressors of these rules, they are prohibited to present themselves at the altar, or to be partakers of any other of our purifications; and this is justly, or rather necessarily done, because every one is not permitted of his own accord to be a writer, nor is there any disagreement in what is written; they being only prophets that have written the original and earliest accounts of things as they learned them of God himself by inspiration; and others have written what hath happened in their own times, and that in a very distinct manner also.