The four points were the certainty of estate in each share, the exclusion of bastards, the admission of a widow to one moiety, and the admission of females in default of issue male. For which reasons, says Sir John, the Kentish custom was always held good and lawful by the law of England. He admits, however, that the Irish custom had a counterpart in North Wales, which had been totally abolished by Henry VIII., along with other usages resembling those of Ireland. Edward I. had only ventured to exclude bastards, and to give widows their dowry.[11] [Sidenote: Sir John Davies did not exhaust the subject.] Notwithstanding the above decision, it is probable that a description of tanistry and gavelkind does not exhaust the subject. The theoretical division among all the males of a sept is not at all likely to have been carried out, except in very early times. Human nature was against it. From the twelfth century the example of the Anglo-Normans, which cannot have been altogether without weight, was against it. The interest of the chief was everywhere against it, because it would deprive him of the means of rewarding his friends, and because he was always tempted to seize lands to his own use. The tendency to private property would be always asserting itself, but the exact historical truth can never be known. Before the close of the mediæval period, a great part of Ireland had been reconquered by the tribes from Anglo-Norman hands. Is it possible that the Irish land system can have been anywhere restored in its integrity? On the whole, it is at least probable that English statesmen in the sixteenth century made as many mistakes about tenures in Ireland as their representatives in the eighteenth and part of the nineteenth made about tenures in India. Good faith may be generally granted in both cases, but the blunders made were no less disastrous. It is at all events clear that primogeniture was no Celtic usage, that it is no part of the law of nature, and that the Tudor lawyers treated it as an end in itself, and almost as a necessary element in the eternal fitness of things. In the twelfth century Irish practice may have come much nearer to theory than in the sixteenth; at all events, Henry II.'s grants to individuals were absolutely opposed to Celtic notions of justice. [Sidenote: Composition for murder.] [Sidenote: Celtic usages part of the common Aryan stock.] [Sidenote: The conflict of laws is the key to Anglo-Irish history.]