There appears something similar to this in the nature of custom. For apart from the authority of civil laws, which regulate the time and manner of custom, and its introduction, it may arise from the indulgence of a sovereign to a conquered people. But the length of time from which custom derives the force of right, is not defined, but left to the arbitrary decision of what is sufficient to indicate general consent. But for silence to be taken as a valid presumption that property is deserted, two things are requisite: it must be a silence with a knowledge of the fact, and with a perfect freedom of will in the person concerned. For a silence founded in ignorance can have no weight; and where any other reason appears, the presumption of free consent must fail.

VI. Although the two requisites already named may be produced, yet other reasons have their weight; among which length of time is not the least important. For in the first place, it can scarcely happen, that for a great length of time a thing belonging to any one should not some way or other come to his knowledge, as time might supply many opportunities. Even if the civil law did not interpose to bar remote pretensions, the very nature of things would shew the reasonableness of a shorter period of limitation being allowed to present than to absent claimants. If impressions of fear were pleaded by any one in excuse, yet their influence would not be of perpetual duration, and length of time would unfold various means of security against such fears, either from resources within himself, or from the assistance of others. Escaping beyond the reach of him he dreaded, he might protest against his oppression, by appealing to proper judges and arbitrators.

VII. Now as time immemorial, considered in a moral light, seems to have no bounds, silence for such a length of time appears sufficient to establish the presumption that all claim to a thing is abandoned, unless the strongest proofs to the contrary can be produced. The most able Lawyers have properly observed, that time according to the memory of man is not an hundred years, though probably it may not fall far short of that space. For a hundred years are the term beyond which human existence seldom reaches; a space, which in general completes three ages or generations of men. The Romans made this objection to Antiochus, that he claimed cities, which neither he himself, his father, nor his grandfather had ever possessed.

VIII. From the natural affection which all men have for themselves, and their property, an objection may be taken against the presumption of any one's abandoning a thing which belongs to him, and consequently negative acts, even though confirmed by a long period of time, are not sufficient to establish the above named conjecture.

Now considering the great importance deservedly attached to the settlement of CROWNS, all conjectures favourable to the possessors ought to be allowed. For if Aratus of Sicyon thought it a hard case, that PRIVATE possessions of fifty years' standing should be disturbed, how much weightier is that maxim of Augustus, that it is the character of a good man and a good subject to wish for no change in the present government, and, in the words, which Thucydides has assigned to Alcibiades, to support the constitution, under which he has been born? But if no such rules in favour of possession could be adduced, yet a more weighty objection might be found against the presumption, drawn from the inclination of every one to preserve his own right, which is the improbability of one man's allowing another to usurp his property for any length of time, without declaring and asserting his own right.

IX. Perhaps it may reasonably be said, that this matter does not rest upon presumption only, but that it is a rule, introduced by the voluntary law of Nations, that uninterrupted possession, against which no claim has been asserted, will entirely transfer such property to the actual possessor. For it is most likely that all nations by consent gave their sanction to such a practice, as conducive to their common peace. The term uninterrupted possession therefore has been very properly used to signify, as Sulpitius says in Livy, "that which has been held by one uniform tenour of right, without intermission." Or as the same author, in another place, calls it, "perpetual possession, that has never been called in question." For a transitory possession creates no title. And it was this exception which the Numidians had urged against the Carthaginians, alleging that as opportunity offered, sometimes the Kings of the Numidians had appropriated to themselves the disputed possessions, which had always remained in the hands of the stronger party.

X. But here another question, and that of considerable difficulty, arises, which is, to decide, whether, by this desertion, persons yet unborn may be deprived of their rights. If we maintain that they MAY NOT, the rule already established would be of no avail towards settling the tranquillity of kingdoms, and security of property. For in most things some thing is due to the interests of posterity. But if we affirm that they MAY, it then seems wonderful that silence should prejudice the rights of those, who were unable to speak, before they had any existence, and that the act of OTHERS should operate to their injury. To clear up this point, we must observe that no rights can belong to a person before he has any existence, as, in the language of the schools, there can be no accident without a substance. Wherefore if a Prince, from urgent motives of policy, and for the advantage of his own native dominions, and subjects, should decline to accept an additional sovereignty, or for the same reasons, should relinquish that, which he had already accepted, he would not be charged with injuring his heirs and successors, then unborn, who could have no rights before they had a natural existence.

Now as a sovereign may EXPRESSLY declare a change of his will respecting such dominions, so that change may, in certain cases, be implied without such declaration.

In consequence of such a change either expressed or implied, before the rights of heirs and successors can be supposed to have any existence, the possession may be considered as entirely abandoned. The case here has been considered according to the LAW OF NATURE: for the civil law, among other fictions, introduced that of the law's personating those, who are not yet in being, and so preventing any occupancy from taking place to their prejudice; a regulation of law established upon no slight grounds in order to preserve estates in families, although every means of PERPETUATING property to individuals, which prevents its transfer from hand to hand, may in some measure be detrimental to the public interest. From whence it is a received opinion, that length of time will give a property in those fees, which were originally conveyed, not by right of succession, but by virtue of primitive investiture. Covarruvias, a lawyer of great judgment, supports this opinion with the strongest arguments in favour of primogeniture, and applies it to estates left in trust. For nothing can prevent the civil law from instituting a right, which, though it cannot be lawfully alienated by the act of one party without consent of the other, yet, to avoid uncertainty in the tenure of present proprietors, may be lost by neglect of claim for a length of time. Still the parties thus deprived may maintain a personal action against those, or their heirs, through whose neglect their right has been forfeited.

XI. It is an inquiry of importance whether the law of usucaption and prescription, if it prevail in a prince's dominions, can be applied to the tenure of the crown, and all its prerogatives. Many legal writers, who have treated of the nature of sovereign power according to the principles of the Roman civil law, seem to affirm that it may be so applied. But this is an opinion to which we cannot accede in its full extent. For to make a law binding upon any one, it is requisite that the legislator should possess both power and will. A legislator is not bound by his law, as by the irrevocable and unchangeable controul of a superior. But occasions may arise that will demand an alteration or even a repeal of the law which he has made. Yet a legislator may be bound by his own law, not directly as a legislator, but as an individual forming part of the community: and that too according to natural equity, which requires that all the component parts should bear a reference to the whole. We find in holy writ, this rule observed by Saul in the beginning of his reign.