§ 93. Introduction.
In the whole range of legal theory there is no conception more difficult than that of possession. The Roman lawyers brought their usual acumen to the analysis of it, and since their day the problem has formed the subject of a voluminous literature, while it still continues to tax the ingenuity of jurists. Nor is the question one of mere curiosity or scientific interest, for its practical importance is not less than its difficulty. The legal consequences which flow from the acquisition and loss of possession are many and serious. Possession, for example, is evidence of ownership; the possessor of a thing is presumed to be the owner of it, and may put all other claimants to proof of their title. Long possession is a sufficient title even to property which originally belonged to another. The transfer of possession is one of the chief methods of transferring ownership. The first possession of a thing which as yet belongs to no one is a good title of right. Even in respect of property already owned, the wrongful possession of it is a good title for the wrongdoer, as against all the world except the true owner. Possession is of such efficacy, also, that a possessor may in many cases confer a good title on another, even though he has none himself; as when I obtain a bank-note from a thief, or goods from a factor who disposes of them in fraud of his principal. These are some, though some only, of the results which the law attributes to possession, rightful or wrongful. They are sufficient to show the importance of this conception, and the necessity of an adequate analysis of its essential nature.
§ 94. Possession in Fact and in Law.
It is necessary to bear in mind from the outset the distinction between possession in fact and possession in law. We have to remember the possibility of more or less serious divergences between legal principles and the truth of things. Not everything which is recognised as possession by the law need be such in truth and in fact. And conversely the law, by reasons good or bad, may be moved to exclude from the limits of the conception facts which rightly fall within them. There are three possible cases in this respect. First, possession may and usually does exist both in fact and in law. The law recognises as possession all that is such in fact, and nothing that is not such in fact, unless there is some special reason to the contrary. Secondly, possession may exist in fact but not in law. Thus the possession by a servant of his master’s property is for some purposes not recognised as such by the law, and he is then said to have detention or custody rather than possession. Thirdly, possession may exist in law but not in fact; that is to say, for some special reason the law attributes the advantages and results of possession to some one who as a matter of fact does not possess. The possession thus fictitiously attributed to him is by English lawyers termed constructive. The Roman lawyers distinguished possession in fact as possessio naturalis, and possession in law as possessio civilis.[[215]]
In consequence of this divergence, partly intentional and avowed, partly accidental and unavowed, between the law and the fact of possession, it is impossible that any abstract theory should completely harmonise with the detailed rules to be found in any concrete body of law. Such harmony would be possible only in a legal system which had developed with absolute logical rigour, undisturbed by historical accidents, and unaffected by any of those special considerations which in all parts of the law prevent the inflexible and consistent recognition of general principles.
It follows from this discordance between law and fact, that a complete theory of possession falls into two parts: first an analysis of the conception itself, and secondly an exposition of the manner in which it is recognised and applied in the actual legal system. It is with the first of those matters that we are here alone concerned.
It is to be noticed that there are not two ideas of possession—a legal and a natural. Were this so, we could dispense altogether with the discussion of possession in fact. There is only one idea, to which the actual rules of law do more or less imperfectly conform. There is no conception which will include all that amounts to possession in law, and will include nothing else, and it is impossible to frame any definition from which the concrete law of possession can be logically deduced. Our task is merely to search for the idea which underlies this body of rules, and of which they are the imperfect and partial expression and application.
The complexities of the English law are increased by the curious circumstance that two distinct kinds of legal possession are recognised in that system. These are distinguished as seisin and possession. To a considerable extent they are governed by different rules and have different effects. I may have seisin of a piece of land but not possession of it, or possession but not seisin, or both at once; and in all those cases I may or may not at the same time have possession in fact. The doctrine of seisin is limited to land; it is one of the curiosities of that most curious of the products of the human intellect, the English law of real property. The doctrine of possession, on the other hand, is common, with certain variations, to land and chattels. The divergence between these two forms of possession in law is a matter of legal history, not of legal theory.
Extraordinary importance was until a comparatively recent period attributed by our law to the acquisition and retention of seisin by the owner of land. Without seisin his right was a mere shadow of ownership, rather than the full reality of it. For many purposes a man had only what he possessed—and the form of his possession must be that which amounted to seisin. A dispossessed owner was deprived of his most effective remedies; he could neither alienate his estate, nor leave it by his will; neither did his heirs inherit it after him. The tendency of modern law is to eliminate the whole doctrine of seisin, as an archaic survival of an earlier process of thought, and to recognise a single form of legal possession.[[216]]