[109] Cf. Doughty, _Arabia Deserta_, vol. i., p. 249. But a change would doubtless be wrought whenever the appointment of a king took place. Then national law would appear, in embryo at least; and at first, until custom had grown up in this region also, it would largely be an expression of the will of the king, and of the royal officers instructed and trained by the king. But it would have free and unchallenged course only when it claimed authority in matters lying outside of the family and tribal jurisdictions. Wherever it attempted to interfere with tribal or family rights, danger to the kingship of the most acute kind would be sure to arise. In all probability, it was disregard of this axiomatic truth which made Solomon's reign so burdensome to the people and tore the kingdom asunder under Rehoboam. Ahab too fell a victim to his disregard of it. Lastly, the introduction of elaborate written codes of law would, if it came as the crown of such a development, depose custom from its supremacy, though it would not abolish it; and would substitute for it as the main element in all judicial matters the written prescription, which is the necessary presupposition of a fully organised judiciary of the modern type, with a regulated and definite power of appeal. But in the case of ancient Israel there is a distinguishing element which has to be fitted into this ordinary scheme of progression, and that is the Divine revelation to Moses. Taken up at the tribal stage by the Mosaic revelation, the Israelite tribes were touched and welded into coherence, if not quite as a nation, at least as the people of Yahweh, so that during all the distracting days of the Judges they kept up in essentials their social and religious unity.[110] And with the religious union there must have come administrative uniformity to some considerable extent. The jurisdiction of the heads of households, of heads of families, and of the tribal elders would be as little interfered with as possible; but, as we have seen, all customs and rights had to be reviewed from the point of view of the new religion, and appeal to Moses as the prophet of it must have often been unavoidable. Just as his first followers were continually coming to Mohammed, to ask whether this or that ancient custom could be followed by professors of Islam, so there must have been constant appeals to Moses. So long as he lived, therefore, he, and after him Joshua and Moses' fellow-tribesmen the sons of Levi, as being specially zealous for the religion of Yahweh, must have been constantly called in to assist the customary judges; and so the habit of appeal must have grown in Israel long before there was any king. Thus also a common standard of judgment would be established. That standard must necessarily have been the law of Yahweh, _i.e._ the new Yahwistic principles and all that might _prima facie_ be deduced from them, together with so much of custom and tradition as had been accepted as compatible with