In the preceding book we have expounded the law of Persons: now let us proceed to the law of Things. Of these, some admit of private ownership, while others, it is held, cannot belong to individuals: for some things are by natural law common to all, some are public, some belong to a society or corporation, and some belong to no one. But most things belong to individuals, being acquired by various titles, as will appear from what follows.

1 Thus, the following things are by natural law common to all—the air, running water, the sea, and consequently the seashore. No one therefore is forbidden access to the seashore, provided he abstains from injury to houses, monuments, and buildings generally; for these are not, like the sea itself, subject to the law of nations.

2 On the other hand, all rivers and harbours are public, so that all persons have a right to fish therein.

3 The seashore extends to the limit of the highest tide in time of storm or winter.

4 Again, the public use of the banks of a river, as of the river itself, is part of the law of nations; consequently every one is entitled to bring his vessel to the bank, and fasten cables to the trees growing there, and use it as a resting-place for the cargo, as freely as he may navigate the river itself. But the ownership of the bank is in the owner of the adjoining land, and consequently so too is the ownership of the trees which grow upon it.

5 Again, the public use of the seashore, as of the sea itself, is part of the law of nations; consequently every one is free to build a cottage upon it for purposes of retreat, as well as to dry his nets and haul them up from the sea. But they cannot be said to belong to any one as private property, but rather are subject to the same law as the sea itself, with the soil or sand which lies beneath it.

6 As examples of things belonging to a society or corporation, and not to individuals, may be cited buildings in cities—theatres, racecourses, and such other similar things as belong to cities in their corporate capacity.

7 Things which are sacred, devoted to superstitious uses, or sanctioned, belong to no one, for what is subject to divine law is no one's property.

8 Those things are sacred which have been duly consecrated to God by His ministers, such as churches and votive offerings which have been properly dedicated to His service; and these we have by our constitution forbidden to be alienated or pledged, except to redeem captives from bondage. If any one attempts to consecrate a thing for himself and by his own authority, its character is unaltered, and it does not become sacred. The ground on which a sacred building is erected remains sacred even after the destruction of the building, as was declared also by Papinian.

9 Any one can devote a place to superstitious uses of his own free will, that is to say, by burying a dead body in his own land. It is not lawful, however, to bury in land which one owns jointly with some one else, and which has not hitherto been used for this purpose, without the other's consent, though one may lawfully bury in a common sepulchre even without such consent. Again, the owner may not devote a place to superstitious uses in which another has a usufruct, without the consent of the latter. It is lawful to bury in another man's ground, if he gives permission, and the ground thereby becomes religious even though he should not give his consent to the interment till after it has taken place.

10 Sanctioned things, too, such as city walls and gates, are, in a sense, subject to divine law, and therefore are not owned by any individual. Such walls are said to be 'sanctioned,' because any offence against them is visited with capital punishment; for which reason those parts of the laws in which we establish a penalty for their transgressors are called sanctions.

11 Things become the private property of individuals in many ways; for the titles by which we acquire ownership in them are some of them titles of natural law, which, as we said, is called the law of nations, while some of them are titles of civil law. It will thus be most convenient to take the older law first: and natural law is clearly the older, having been instituted by nature at the first origin of mankind, whereas civil laws first came into existence when states began to be founded, magistrates to be created, and laws to be written.

12 Wild animals, birds, and fish, that is to say all the creatures which the land, the sea, and the sky produce, as soon as they are caught by any one become at once the property of their captor by the law of nations; for natural reason admits the title of the first occupant to that which previously had no owner. So far as the occupant's title is concerned, it is immaterial whether it is on his own land or on that of another that he catches wild animals or birds, though it is clear that if he goes on another man's land for the sake of hunting or fowling, the latter may forbid him entry if aware of his purpose. An animal thus caught by you is deemed your property so long as it is completely under your control; but so soon as it has escaped from your control, and recovered its natural liberty, it ceases to be yours, and belongs to the first person who subsequently catches it. It is deemed to have recovered its natural liberty when you have lost sight of it, or when, though it is still in your sight, it would be difficult to pursue it.

13 It has been doubted whether a wild animal becomes your property immediately you have wounded it so severely as to be able to catch it. Some have thought that it becomes yours at once, and remains so as long as you pursue it, though it ceases to be yours when you cease the pursuit, and becomes again the property of any one who catches it: others have been of opinion that it does not belong to you till you have actually caught it. And we confirm this latter view, for it may happen in many ways that you will not capture it.

14 Bees again are naturally wild; hence if a swarm settles on your tree, it is no more considered yours, until you have hived it, than the birds which build their nests there, and consequently if it is hived by some one else, it becomes his property. So too any one may take the honeycombs which bees may chance to have made, though, of course, if you see some one coming on your land for this purpose, you have a right, to forbid him entry before that purpose is effected. A swarm which has flown from your hive is considered to remain yours so long as it is in your sight and easy of pursuit: otherwise it belongs to the first person who catches it.

15 Peafowl too and pigeons are naturally wild, and it is no valid objection that they are used to return to the same spots from which they fly away, for bees do this, and it is admitted that bees are wild by nature; and some people have deer so tame that they will go into the woods and yet habitually come back again, and still no one denies that they are naturally wild. With regard, however, to animals which have this habit of going away and coming back again, the rule has been established that they are deemed yours so long as they have the intent to return: for if they cease to have this intention they cease to be yours, and belong to the first person who takes them; and when they lose the habit they seem also to have lost the intention of returning.

16 Fowls and geese are not naturally wild, as is shown by the fact that there are some kinds of fowls and geese which we call wild kinds. Hence if your geese or fowls are frightened and fly away, they are considered to continue yours wherever they may be, even though you have lost sight of them; and any one who keeps them intending thereby to make a profit is held guilty of theft.

17 Things again which we capture from the enemy at once become ours by the law of nations, so that by this rule even free men become our slaves, though, if they escape from our power and return to their own people, they recover their previous condition.

18 Precious stones too, and gems, and all other things found on the seashore, become immediately by natural law the property of the finder:

19 and by the same law the young of animals of which you are the owner become your property also.

20 Moreover, soil which a river has added to your land by alluvion becomes yours by the law of nations. Alluvion is an imperceptible addition; and that which is added so gradually that you cannot perceive the exact increase from one moment of time to another is added by alluvion.

21 If, however, the violence of the stream sweeps away a parcel of your land and carries it down to the land of your neighbour it clearly remains yours; though of course if in the process of time it becomes firmly attached to your neighbour's land, they are deemed from that time to have become part and parcel thereof.

22 When an island rises in the sea, though this rarely happens, it belongs to the first occupant; for, until occupied, it is held to belong to no one. If, however (as often occurs), an island rises in a river, and it lies in the middle of the stream, it belongs in common to the landowners on either bank, in proportion to the extent of their riparian interest; but if it lies nearer to one bank than to the other, it belongs to the landowners on that bank only. If a river divides into two channels, and by uniting again these channels transform a man's land into an island, the ownership of that land is in no way altered:

23 but if a river entirely leaves its old channel, and begins to run in a new one, the old channel belongs to the landowners on either side of it in proportion to the extent of their riparian interest, while the new one acquires the same legal character as the river itself, and becomes public. But if after a while the river returns to its old channel, the new channel again becomes the property of those who possess the land along its banks.

24 It is otherwise if one's land is wholly flooded, for a flood does not permanently alter the nature of the land, and consequently if the water goes back the soil clearly belongs to its previous owner.

25 When a man makes a new object out of materials belonging to another, the question usually arises, to which of them, by natural reason, does this new object belong—to the man who made it, or to the owner of the materials? For instance, one man may make wine, or oil, or corn, out of another man's grapes, olives, or sheaves; or a vessel out of his gold, silver, or bronze; or mead of his wine and honey; or a plaster or eyesalve out of his drugs; or cloth out of his wool; or a ship, a chest, or a chair out of his timber. After many controversies between the Sabinians and Proculians, the law has now been settled as follows, in accordance with the view of those who followed a middle course between the opinions of the two schools. If the new object can be reduced to the materials out of which it was made, it belongs to the owner of the materials; if not, it belongs to the person who made it. For instance, a vessel can be melted down, and so reduced to the rude material—bronze, silver, or gold—of which it is made: but it is impossible to reconvert wine into grapes, oil into olives, or corn into sheaves, or even mead into the wine and honey out of which it was compounded. But if a man makes a new object out of materials which belong partly to him and partly to another—for instance, mead of his own wine and another's honey, or a plaster or eyesalve of drugs which are not all his own, or cloth of wool which belongs only in part to him—in this case there can be no doubt that the new object belongs to its creator, for he has contributed not only part of the material, but the labour by which it was made.

26 If, however, a man weaves into his own cloth another man's purple, the latter, though the more valuable, becomes part of the cloth by accession; but its former owner can maintain an action of theft against the purloiner, and also a condiction, or action for reparative damages, whether it was he who made the cloth, or some one else; for although the destruction of property is a bar to a real action for its recovery, it is no bar to a condiction against the thief and certain other possessors.

27 If materials belonging to two persons are mixed by consent—for instance, if they mix their wines, or melt together their gold or their silver—the result of the mixture belongs to them in common. And the law is the same if the materials are of different kinds, and their mixture consequently results in a new object, as where mead is made by mixing wine and honey, or electrum by mixing gold and silver; for even here it is not doubted that the new object belongs in common to the owners of the materials. And if it is by accident, and not by the intention of the owners, that materials have become mixed, the law is the same, whether they were of the same or of different kinds.

28 But if the corn of Titius has become mixed with yours, and this by mutual consent, the whole will belong to you in common, because the separate bodies or grains, which before belonged to one or the other of you in severalty, have by consent on both sides been made your joint property. If, however, the mixture was accidental, or if Titius mixed the two parcels of corn without your consent, they do not belong to you in common, because the separate grains remain distinct, and their substance is unaltered; and in such cases the corn no more becomes common property than does a flock formed by the accidental mixture of Titius's sheep with yours. But if either of you keeps the whole of the mixed corn, the other can bring a real action for the recovery of such part of it as belongs to him, it being part of the province of the judge to determine the quality of the wheat which belonged to each.

29 If a man builds upon his own ground with another's materials, the building is deemed to be his property, for buildings become a part of the ground on which they stand. And yet he who was owner of the materials does not cease to own them, but he cannot bring a real action for their recovery, or sue for their production, by reason of a clause in the Twelve Tables providing that no one shall be compelled to take out of his house materials (tignum), even though they belong to another, which have once been built into it, but that double their value may be recovered by the action called 'de tigno iniuncto.' The term tignum includes every kind of material employed in building, and the object of this provision is to avoid the necessity of having buildings pulled down; but if through some cause or other they should be destroyed, the owner of the materials, unless he has already sued for double value, may bring a real action for recovery, or a personal action for production.

30 On the other hand, if one man builds a house on another's land with his own materials, the house belongs to the owner of the land. In this case, however, the right of the previous owner in the materials is extinguished, because he is deemed to have voluntarily parted with them, though only, of course, if he was aware that the land on which he was building belonged to another man. Consequently, though the house should be destroyed, he cannot claim the materials by real action. Of course, if the builder of the house has possession of the land, and the owner of the latter claims the house by real action, but refuses to pay for the materials and the workmen's wages, he can be defeated by the plea of fraud, provided the builder's possession is in good faith: for if he knew that the land belonged to some one else it may be urged against him that he was to blame for rashly building on land owned to his knowledge by another man.

31 If Titius plants another man's shrub in land belonging to himself, the shrub will become his; and, conversely, if he plants his own shrub in the land of Maevius, it will belong to Maevius. In neither case, however, will the ownership be transferred until the shrub has taken root: for, until it has done this, it continues to belong to the original owner. So strict indeed is the rule that the ownership of the shrub is transferred from the moment it has taken root, that if a neighbour's tree grows so close to the land of Titius that the soil of the latter presses round it, whereby it drives its roots entirely into the same, we say the tree becomes the property of Titius, on the ground that it would be unreasonable to allow the owner of a tree to be a different person from the owner of the land in which it is rooted. Consequently, if a tree which grows on the boundaries of two estates drives its roots even partially into the neighbour's soil, it becomes the common property of the two landowners.

32 On the same principle corn is reckoned to become a part of the soil in which it is sown. But exactly as (according to what we said) a man who builds on another's land can defend himself by the plea of fraud when sued for the building by the owner of the land, so here too one who has in good faith and at his own expense put crops into another man's soil can shelter himself behind the same plea, if refused compensation for labour and outlay.

33 Writing again, even though it be in letters of gold, becomes a part of the paper or parchment, exactly as buildings and sown crops become part of the soil, and consequently if Titius writes a poem, or a history, or a speech on your paper and parchment, the whole will be held to belong to you, and not to Titius. But if you sue Titius to recover your books or parchments, and refuse to pay the value of the writing, he will be able to defend himself by the plea of fraud, provided that he obtained possession of the paper or parchment in good faith.

34 Where, on the other hand, one man paints a picture on another's board, some think that the board belongs, by accession, to the painter, others, that the painting, however great its excellence, becomes part of the board. The former appears to us the better opinion, for it is absurd that a painting by Apelles or Parrhasius should be an accessory of a board which, in itself, is thoroughly worthless. Hence, if the owner of the board has possession of the picture, and is sued for it by the painter, who nevertheless refuses to pay the cost of the board, he will be able to repel him by the plea of fraud. If, on the other hand, the painter has possession, it follows from what has been said that the former owner of the board, [if he is to be able to sue at all], must claim it by a modified and not by a direct action; and in this case, if he refuses to pay the cost of the picture, he can be repelled by the plea of fraud, provided that the possession of the painter be in good faith; for it is clear, that if the board was stolen by the painter, or some one else, from its former owner, the latter can bring the action of theft.

35 If a man in good faith buys land from another who is not its owner, though he believed he was, or acquires it in good faith by gift or some other lawful title, natural reason directs that the fruits which he has gathered shall be his, in consideration of his care and cultivation: consequently if the owner subsequently appears and claims the land by real action, he cannot sue for fruits which the possessor has consumed. This, however, is not allowed to one who takes possession of land which to his knowledge belongs to another person, and therefore he is obliged not only to restore the land, but to make compensation for fruits even though they have been consumed.

36 A person who has a usufruct in land does not become owner of the fruits which grow thereon until he has himself gathered them; consequently fruits which, at the moment of his decease, though ripe, are yet ungathered, do not belong to his heir, but to the owner of the land. What has been said applies also in the main to the lessee of land.

37 The term 'fruits,' when used of animals, comprises their young, as well as milk, hair, and wool; thus lambs, kids, calves, and foals, belong at once, by the natural law of ownership, to the fructuary. But the term does not include the offspring of a female slave, which consequently belongs to her master; for it seemed absurd to reckon human beings as fruits, when it is for their sake that all other fruits have been provided by nature.

38 The usufructuary of a flock, as Julian held, ought to replace any of the animals which die from the young of the rest, and, if his usufruct be of land, to replace dead vines or trees; for it is his duty to cultivate according to law and use them like a careful head of a family.

39 If a man found treasure in his own land, the Emperor Hadrian, following natural equity, adjudged to him the ownership of it, as he also did to a man who found one by accident in soil which was sacred or religious. If he found it in another man's land by accident, and without specially searching for it, he gave half to the finder, half to the owner of the soil; and upon this principle, if a treasure were found in land belonging to the Emperor, he decided that half should belong to the latter, and half to the finder; and consistently with this, if a man finds one in land which belongs to the imperial treasury or the people, half belongs to him, and half to the treasury or the State.

40 Delivery again is a mode in which we acquire things by natural law; for it is most agreeable to natural equity that where a man wishes to transfer his property to another person his wish should be confirmed. Consequently corporeal things, whatever be their nature, admit of delivery, and delivery by their owner makes them the property of the alienee; this, for instance, is the mode of alienating stipendiary and tributary estates, that is to say, estates lying in provincial soil; between which, however, and estates in Italy there now exists, according to our constitution, no difference.

41 And ownership is transferred whether the motive of the delivery be the desire to make a gift, to confer a dowry, or any other motive whatsoever. When, however, a thing is sold and delivered, it does not become the purchaser's property until he has paid the price to the vendor, or satisfied him in some other way, as by getting some one else to accept liability for him, or by pledge. And this rule, though laid down also in the statute of the Twelve Tables, is rightly said to be a dictate of the law of all nations, that is, of natural law. But if the vendor gives the purchaser credit, the goods sold belong to the latter at once.

42 It is immaterial whether the person who makes delivery is the owner himself, or some one else acting with his consent.

43 Consequently, if any one is entrusted by an owner with the management of his business at his own free discretion, and in the execution of his commission sells and delivers any article, he makes the receiver its owner.

44 In some cases even the owner's bare will is sufficient, without delivery, to transfer ownership. For instance, if a man sells or makes you a present of a thing which he has previously lent or let to you or placed in your custody, though it was not from that motive he originally delivered it to you, yet by the very fact that he suffers it to be yours you at once become its owner as fully as if it had been originally delivered for the purpose of passing the property.

45 So too if a man sells goods lying in a warehouse, he transfers the ownership of them to the purchaser immediately he has delivered to the latter the keys of the warehouse.

46 Nay, in some cases the will of the owner, though directly only towards an uncertain person, transfers the ownership of the thing, as for instance when praetors and consuls throw money to a crowd: here they know not which specific coin each person will get, yet they make the unknown recipient immediately owner, because it is their will that each shall have what he gets.

47 Accordingly, it is true that if a man takes possession of property abandoned by its previous owner, he at once becomes its owner himself: and a thing is said to be abandoned which its owner throws away with the deliberate intention that it shall no longer be part of his property, and of which, consequently, he immediately ceases to be the owner.

48 It is otherwise with things which are thrown overboard during a storm, in order to lighten the ship; in the ownership of these things there is no change, because the reason for which they are thrown overboard is obviously not that the owner does not care to own them any longer, but that he and the ship besides may be more likely to escape the perils of the sea. Consequently any one who carries them off after they are washed on shore, or who picks them up at sea and keeps them, intending to make a profit thereby, commits a theft; for such things seem to be in much the same position as those which fall out of a carriage in motion unknown to their owners.