DEODANDS, and forfeitures in general, as well as wrecks, treasure trove, royal fish, mines, waifs, and estrays, may be granted by the king to particular subjects, as a royal franchise: and indeed they are for the most part granted out to the lords of manors, or other liberties; to the perversion of their original design. XVII. ANOTHER branch of the king's ordinary revenue arises from escheats of lands, which happen upon the defect of heirs to succeed to the inheritance; whereupon they in general revert to and vest in the king, who is esteemed, in the eye of the law, the original proprietor of all the lands in the kingdom. But the discussion of this topic more properly belongs to the second book of these commentaries, wherein we shall particularly consider the manner in which lands may be acquired or lost by escheat. XVIII. I PROCEED therefore to the eighteenth and last branch of the king's ordinary revenue; which consists in the custody of idiots, from whence we shall be naturally led to consider also the custody of lunatics. AN idiot, or natural fool, is one that hath had no understanding from his nativity; and therefore is by law presumed never likely to attain any. For which reason the custody of him and of his lands was formerly vested in the lord of the fee[h]; (and therefore still, by special custom, in some manors the lord shall have the ordering of idiot and lunatic copyholders[i]) but, by reason of the manifold abuses of this power by subjects, it was at last provided by common consent, that it should be given to the king, as the general conservator of his people, in order to prevent the idiot from wasting his estate, and reducing himself and his heirs to poverty and distress[k]: This fiscal prerogative of the king is declared in parliament by statute 17 Edw. II. c. 9. which directs (in affirmance of the common law[l],) that the king shall have ward of the lands of natural fools, taking the profits without waste or destruction, and shall find them necessaries; and after the death of such idiots he shall render the estate to the heirs; in order to prevent such idiots from aliening their lands, and their heirs from being disherited. [Footnote h: Flet. _l._ 1. _c._ 11. Sec. 10.] [Footnote i: Dyer. 302. Hutt. 17. Noy 27.] [Footnote k: F.N.B. 232.] [Footnote l: 4 Rep. 126.]