The first attempt we know of to centralise worship was made by Hezekiah; a second and more strenuous attempt was made under Josiah, but the work was not actually accomplished till after the Return from the Captivity. All the facts taken together suggest that the movement towards centralisation was an age-long development. At first all holy places might be sacrificed at, though a certain primacy belonged to a central sanctuary, and this may have been stamped by Moses with approval. When the Solomonic Temple was built the primacy began to take the form of a claim for exclusive validity. The experiences in both kingdoms strengthened that claim, by showing that if Yahwism was to be kept pure the worship at the High Places must be abolished. The inspired writer of Deuteronomy then completed Moses' work by embodying that which had been always a tendency of the Mosaic system, and had now become a necessity, in his revisal of the Mosaic legislation. This was adopted by the nation under Josiah, and the Priest Codex must in that case represent a later stage of the development, when the centralisation was neither a tendency nor a demand, but a realised fact. Such a process accounts much better for the facts than the traditional belief; and though it is not free from difficulties it at least releases us from the confusion of mind which the ordinary supposition forces upon us. The inquiry as to the agents of the cultus need not detain us so long. In the Book of the Covenant no priests are mentioned at all. The person addressed, the "thou" of these chapters, which is either the individual Israelite or the whole community, has been held by some to indicate that the individual offerer was the only agent in sacrifice. But that is to press the word too far. Even in Leviticus, while the whole people are addressed, the actions enjoined or prohibited are such as are done by "any man of them," and in Deut. xii. 13 we have precisely the same expression, "Take heed to thyself that thou offer not thy burnt offerings in every place that thou seest," used at a time when there was undeniably a priestly tribe and even the High Places had a regular priesthood. But while in Exod. xx.-xxiii. there is no evidence to show whether a priesthood existed, in the previous chapter (xix. 22, 24) priests who "come near to Yahweh" are twice mentioned. This would be a fact of the first importance were it not that the words occur in a passage which is admitted to be in its present shape the work of the later editor. Dillmann maintains, and with good reason, that he has inserted and adapted here a fragment of J. If so then J may have held the view that there were priests before Sinai was reached, but under the circumstances we cannot be certain that the mention of them may not be an anachronism introduced by the later hand. In favour of the view that it is so is the fact that in the account given by JE of the ratification of the Covenant between Yahweh and the people (Exod. xxiv.