The Online Library of Liberty

A project of Liberty Fund, Inc.

• Preface
• Explanation of Abbreviations
• Historical Introduction
• Commentarivs Primvs De Ivre
• [i. De Ivre Civili Et Natvrali.]
• [ii. De Ivris Divisione.]
• [iii. De Condicione Hominvm.]
• [iiii. De De Di Ticiis Vel Lege Aelia Sentia.]
• De His Qvi Svi Vel Alieni Ivris Sint.
• De Patria Potestate.
• De Manv.
• De Mancipio.
• Qvibus Modis Ivs Potestatis Solvatvr.
• De Tvtelis.
• De Cvratoribvs.
• De Cvratoribvs.
• Commentarivs Secvndvs De Rebvs Singvlis Et De Rervm Universitatibvs
• De Rervm Divisione.
• Rervm Corporalivm Adqvisitiones Civiles.
• Qvibvs Alienare Liceat Vel Non.
• De Pvpillis an Aliqvid a Se Alienare Possvnt.
• Qvibvs Modis Per Vniversitatem Res Adqvirantvr.
• [de Legatis.]
• De Fideicommissariis Hereditatibvs.
• Commentarivs Tertivs Intestatorvm Hereditates
• De Legitima Agnatorvm Svccessione.
• Consensv Obligationes.
• Addendum Formal, Abstract, and Simulative Dispositions.
• Commentarivs Qvartvs
• Appendix Additions and Amendments

DE RERVM DIVISIONE.

§ 1.Superiore commentario de iure personarum | exposuimus; modo uideamus de rebus; quae uel in nostro patrimonio sunt uel extra nostrum patrimonium habentur.

§ 2. Summa itaque rerum diuisio in duos articulos diducitur: nam aliae sunt diuini iuris, aliae humani.

§ 3. Diuini iuris sunt ueluti res sacrae et religiosae.

§ 4. Sacrae sunt quae diis superis consecratae sunt; religiosae quae diis Manibusrelictae sunt.

§ 5. Sed sacrum quidem hoc solum existimatur quod ex auctoritate populi Romani consecratum est, ueluti lege de ea re lata aut senatusconsulto facto.

§ 6. Religiosum uero nostra uoluntate facimus mortuum inferentes in locum nostrum, si modo eius mortui funus ad nos pertineat.

§ 7. Sed in prouinciali solo placet plerisque solum religiosum non fieri, quia in eo solo dominium populi Romani est uel Caesaris, nos autem possessionem tantum uel usumfructum habere uidemur; utique tamen etiamsi non sit religiosum, pro religioso habetur.

§ 7 a. Item quod in prouinciis non ex auctoritate populi Romani consecratum est, proprie sacrum non est, tamen pro sacro habetur.

§ 8. Sanctae quoque res, uelut muri et portae, quodammodo diuini iuris sunt.

§ 9. Quod autem diuini iuris est, id nullius in bonis est; id uero, quod humani iuris est, plerumque alicuius in bonis est: potest autem et nullius in bonis esse; nam res hereditariae, antequam aliquis heres existat, nullius in bonis sunt.

§ 9 b. —

(8 fere uersus in C legi nequeunt)

—|NA *e domino.

§ 10. Hae autem quae humani iuris sunt, aut publicae sunt aut priuatae.

§ 11. Quae publicae sunt, nullius uidentur in bonis esse; ipsius enim uniuersitatis esse creduntur. priuatae sunt quae singulorum hominum sunt.

DE REBVS INCORPORALIBVS.

§ 12. Quaedam praeterea res corporales sunt, quaedam in 〈corporales〉.

§ 13. Corporales hae 〈sunt〉 quae tangi possunt, uelut fundus homo uestis aurum argentum et denique aliae res innumerabiles.

§ 14. Incorporales sunt quae tangi non possunt, qualia sunt ea quae iure consistunt, sicut hereditas ususfructus obligationes quoquo modo contractae. nec ad rem per〈tinet, quod in hereditate res corporales con-〉tinentur et fructus qui ex fundo percipiuntur corporales sunt, et quod ex aliqua obligatione nobis debetur, id plerumque corporale est, ueluti fundus homo pecunia; nam ipsum ius successionis et ipsum ius utendi fruendi et ipsum ius obligationis incorporale est. eodem numero sunt iura praediorum urba|norum et rusticorum. —|—NA altius tollendi —|—NA luminibus uicini aed — non extollen|di, ne luminibus uicini officiatur. | item fluminum et stilicidiorum — ius, ut—|—NAin aream—|—|—|—NA ius aquae ducendae—|—NA

DE RERVM DIVISIONE.

§ 1. In the preceding book the law of persons was expounded; now let us proceed to the law of things, which are either subject to private dominion or not subject to private dominion.

§ 2. The leading division of things is into two classes: things subjects of divine, and things subjects of human right.

§ 3. Subjects of divine right are things sacred and things religious.

§ 4. Sacred things are those consecrated to the gods above; religious, those devoted to the gods below.

§ 5. Sacred things can only become so with the authority of the people of Rome, by consecration in pursuance of a law or a decree of the senate.

§ 6. A religious thing becomes so by private will, when an individual buries a dead body in his own ground, provided the burial is his proper business.

§ 7. On provincial soil, according to most authorities, ground does not become religious as the dominion belongs to the people of Rome or the Emperor, and individuals only have possession or usufruct, but such places, though not properly religious, are to be regarded as quasi-religious.

§ 7 a. Just as provincial soil, in default of the authorization of the people of Rome, is rendered by consecration not sacred, but quasisacred.

§ 8. Sanctioned places are to a certain extent under divine dominion, such as city gates and city walls.

§ 9. Things subject to divine dominion are exempt from private dominion; things subject to human dominion are generally subject to private dominion, but may be otherwise: for things belonging to an inheritance before any one has become heir have no actual owner.

§ 10. Things subject to human dominion are either public or private.

§ 11. Things public belong to no individual, but to a society or corporation; things private are subject to individual dominion.

DE REBVS INCORPORALIBVS.

§ 12. Again, things are either corporeal or incorporeal.

§ 13. Things corporeal are tan gible, as land, a slave, clothing, gold, silver, and innumerable others.

§ 14. Things incorporeal are intangible; such as those which have an existence simply in law as inheritance, usufruct, obligation, however contracted. For though an inheritance comprises things corporeal, and the fruits of land enjoyed by a usufructuary are corporeal, and obligations generally bind us to make over the conveyance of something corporeal: land, slaves, money; yet the right of succession, the right of usufruct, and the right of obligation are incorporeal. So are the rights attached to property in houses and land. The following are rights attached to property in houses; the right of raising a building and thereby obstructing the lights of a neighbouring building; the right of prohibiting a building being raised, so that one’s lights may not be interfered with; the right of letting rain-water fall in a body or in drops on a neighbour’s roof or area; the right of having a sewer through a neighbour’s area, or a window in a neighbour’s wall (cf. Epit. 2, 1, 3). The following are rights attached to property in land: iter, a right of way on foot or horseback; actus, a right of way for ordinary carriages; via, a right of paved way for heavy-laden wagons; pecoris ad aquam appulsus, a right of watering cattle; aquae ductus, a right of conveying water through the tenement of another.

Having treated of the law of Persons (unequal rights), we proceed to the law of Things (equal rights), and the first right which Gaius intends to discuss is the right called Dominion. Seduced, however, by an ambiguity of the word Res, which signifies either a right or the subject of a right, his opening statements (§§ 12-14) are deplorably confused.

In order to see our way, let us first examine Res as denoting the Object of a right. Every right implies, as we have stated, a duty; and every right or duty implies at least two persons, one of whom is entitled to the right while the other is liable to the duty. The immediate object of every right is an act or forbearance of the person who is liable to the duty. But the act or forbearance generally relates to some body, that is, to some tangible portion of the external world, whether a thing or a person. This body, accordingly, may be called the mediate, indirect, or secondary Object of the right. The secondary object of a right, however, is not always a body; it may be corporeal or incorporeal. For instance, dominium over land is a right to forbearance on the part of all the world from molestation of the owner in dealing with the land. A servitude, say a right of way, is a right to forbearance on the part of all the world from molestation of the person entitled when he passes over certain land. A contractual right is a right to a positive act or forbearance on the part of a determinate person, say, to the conveyance or delivery of a certain piece of land. In these cases, land, the secondary object of the right, is something corporeal. So, too, when a person is the object of a right; for instance, a child or a gladiator, 3 § 199, in the possession (detention or custody) of the parent or employer, and whose removal from such possession engenders in the removing party an obligation ex delicto. But in primordial rights, the object, at least as distinguished from the two parties in whom the right and duty respectively vest, is something incorporeal. A man has a right to forbearance on the part of all the world from molestation in his life, health, locomotion, honour. These objects of the right are incorporeal. Other rights, apparently, have no determinate object, corporeal or incorporeal, to which they are correlated. In a right to the services of a menial or gladiator, for instance, it would be hard to indicate any secondary or corporeal object to which the obligation of the menial or gladiator relates.

It is clear that no division of Objects of right will coincide with a classification of Rights: while, if we divide Res in the metaphysical sense of the World, or Being, or Existence (a sense suggested by the differentiae, corporalis, and incorporalis), Dominium, like all other rights, will be a member of the branch res incorporales, or Ownership. Gaius, however, wishes us to identify Dominium with res corporalis, and to make Obligation and the fractions of Dominium (servitutes), and even some forms of Dominium (e. g. hereditas), members of the contra-distinguished branch, res incorporalis. (Cf. 3 § 83, omnes ejus res incorporales et corporales quaeque ei debita sunt.)

Gaius was probably not entirely responsible for this confusion of thought, which, perhaps, was too deeply inwoven in the formulae of Roman jurisprudence to be easily eliminated by an institutional writer. E. g. the declaration (intentio) of a real action (in rem actio) was of the form: Si paret (1) illum fundum—(2) illam hereditatem—actoris esse. (Cf. 4 § 3 In rem actio est cum aut corporalem rem intendimus nostram esse aut jus aliquod nobis competere.) Now as hereditas is a jus successionis, § 14, it is clear that, if the second formula is correct, the first formula ought to be, not, Si paret illum fundum—but, Si paret illius fundi dominium—actoris esse. To meet this and similar inaccuracies of the framers of the formularies, Gaius is misled into identifying in res corporalis two things completely disparate, Right and the corporeal thing or Secondary Object of a right. There is a similar confusion in English law, chattels, tenements, and hereditaments being sometimes used to denote the objects, movable or immovable, of certain rights, sometimes the rights over those objects: and just as Res is divided into Corporalis and Incorporalis, so Hereditaments are divided into Corporeal and Incorporeal; although, if the term denotes a right, both branches are equally incorporeal: if it denotes the secondary object of a right, both branches are equally corporeal.

We shall find hereafter, 4 §§ 138-170, comm., that the position of possession in Roman jurisprudence—whether it belongs to the department of jus in rem or of obligatio ex delicto—is a moot question; but at present we need do no more than notice the existence of the controversy. We need also only to indicate a division of rights and duties into single rights and duties, and aggregates of rights and duties (universitas juris), such as Hereditas. A universitas juris includes Obligations as well as Rights, Jus in personam as well as Jus in rem, being in fact the succession of one person to which another person succeeds. But in spite of the diverse character of the elements of which it is composed, the juris universitas itself, or the ideal whole of these various elements, is regarded, e. g. in Hereditatis petitio, as a real Right, not an Obligation; as a Jus in rem, not a Jus in personam.

As Gaius thought that he could obtain the idea of Dominium by a division of Res into corporales and incorporales, so he seems to have thought that he could distinguish private dominium, the special department which he intends to examine, from other forms of dominium by a further division of Res. The phrases res divinae, res humanae, res communes, res publicae, res privatae, do indeed suggest the notion that res privatae is a specific member of the genus Res; but the appearance is fallacious. Very little reflection will convince us that res divinae, res publicae, res privatae are not a division of the objects of property (res); for the same thing, a piece of ground, for instance, may be an object of divine or public or private dominion; but merely a division of proprietors. In res divinae, the only doubtful case, the gods were deemed to be proprietors. Sed et illa interdicta quae de locis sacris et de religiosis proponuntur veluti proprietatis causam continent, Dig. 43, 1, 2, 2. ‘The interdicts respecting sacred and religious places protect a quasi-property.’

The division of the objects of right by their physical differences, the only way in which they can be divided, though only of subordinate importance, and though it cannot furnish the distinctions of Dominium and Obligation, nor of Public and Private dominium, yet has a considerable influence on jurisprudence, and demands a certain amount of attention. Thus ocean, air, and light, as opposed to the earth, are by their nature essentially res communes. Being incapable of appropriation, they have not been appropriated and are held in communism. Again, in wild animals, as opposed to tame, property is only coextensive with possession. On the difference between specific and generic things, or things consumed by use, quae pondere numero mensurave constant, and things not consumed by use, is founded the distinction between the contracts of mutuum and commodatum. Cf. 3 § 90. On the same difference of specific and generic things are founded different rules relating to the contract of sale, 3 §§ 139-141, comm.; and the distinction of movables and immovables founds important differences in Roman and other systems of law.

The phrases in nostro patrimonio and extra nostrum patrimonium, § 1, are apparently equivalent to alicujus in bonis and nullius in bonis, § 9, and to the expressions we meet elsewhere, in commercio and extra commercium.

Of res communes, or things such as air and running water, which sometimes come under discussion (cf. Inst. 2, 1, 1 Et quidem naturali jure communia sunt omnium haec: aer et aqua profluens et mare et per hoc litora maris) but are not mentioned by Gaius, we may observe, that they only fall within the province of positive law, as belonging to the jurisdiction of each particular state.

All the things within the territory of a given state are subject to its dominion (dominium eminens), that is, are res publicae in a general sense of the term. Of these things it allows the dominium over some to vest in private individuals for their own advantage, while it retains the dominium over others in itself as if it were a corporation or collective person (personarum universitas). This gives us a division of all things into res privatae and res publicae in a narrower sense of the term. We must note, however, that the dominium of the state is not exactly similar to private dominium, that is to say, is not dominium in the proper sense or the sense in which the word is used in civil law. For the civil dominium of private persons is a right protected and sanctioned by a political superior, whereas a sovereign state is by hypothesis in subjection to no superior. A state, then, can only be said to have dominium in a modified sense of the word, that is, so far as it is not restrained by any positive law of any superior from using and dealing with certain things as it may please.

Of things which are objects of public dominion, some are vested immediately in the state, others in subordinate persons, single or corporate, magistrates, for instance, and municipalities, to be held by such persons for various public purposes. Among these we might also reckon res divini juris, though as dedicated to religious purposes, such things were regarded by the Romans as no man’s property, §§ 3-6.

Another division of res publicae is into res in patrimonio populi and res non in patrimonio populi. Under the former are included the public treasury, the public domain, public slaves, bequests lapsing to the state (caduca) or res privatae otherwise devolving on the state; in other words, all things of which the state as universitas retains not only the property but also the use and disposition (res enim fiscales quasi propriae et privatae principis sunt, Dig. 43, 8, 2, 4). The other class includes high roads, public rivers, public buildings, &c., that is, all things of which the property is in the community and the use in the members of the community. Or we may say that the property is in the universitas, but it is subject to a personal servitude (usus) vested in all the private members of that universitas (singuli, universi).

Not only res publicae but res privatae may be thus subject. For instance, the banks of public rivers and the trees thereupon are the property of the adjacent proprietors; but the navigators of these rivers have the right of mooring, landing, unlading, and using the banks in various other ways, Inst. 2, 1, 4.

Ownership (dominium) absolute or pre-eminently so called, may be defined as a right of unlimited duration, imparting to the owner a power of indefinite enjoyment or use, and a power of aliening from all who in default of alienation by him might succeed by descent; or, in other words, from all successors interposed between himself and the sovereign as ultimus heres. It is accordingly sometimes said to consist of jus utendi, fruendi, abutendi; where abusus includes the power of consumption or destruction, of dereliction, and of disposition (sale, exchange, gift, mortgage, lease, &c.). Another element is equally important, the right of exclusion (jus prohibendi). Another is the jus transmittendi, i. e. the right of leaving the integral right, in the absence of Disposition, to those whom he would presumably have wished to be his successors.

Besides ownership (dominium) Roman law recognizes various kinds of partial property, real rights over an object of which the dominium is in another person, called jura in re or jura in re aliena, rights which fall short of absolute property but approximate to it in various degrees. Such rights, which are limitations of ownership, are servitudes, § 14, mortgage (pignus), superficies, and emphyteusis. These may all be regarded as detached fractions of ownership, portions of the right of dominion taken from the proprietor and vested in another person. Servitudes are explained by Justinian in the parallel passage of his Institutes (2, 3-5), and, together with the other jura in re aliena, demand here a brief notice.

Servitudes are (1) praedial or real (praediorum), that is, belong to a person as owner of a certain house or land (praedium dominans) in respect of a house or land belonging to another proprietor (praedium serviens), or (2) personal (personarum), that is, are vested in a person without relation to his ownership of praedium dominans, and being thus inseparably attached to him they are inalienable and determine at his death. (Compare in English law the division of easements into easements appurtenant to land and easements in gross.)

Praedial servitudes are servitudes in the strictest sense, being contrasted with ownership by their precise and definite circumscription. Ownership (dominium) is a right against the world which gives to the party in whom it resides a power of dealing with the subject which is not capable of exact definition. Servitude is such a right against the world as gives to the party in whom it resides a power of using the subject which is susceptible of precise description. It is a definite subtraction from the indefinite powers of use and exclusion which reside in the owner; or a right against the owner and the rest of the world to make certain use of a thing or prohibit certain uses.

Praedial servitudes are (1) rustic, relating to land, or (2) urban, relating to houses. Urban servitudes are further subdivided into Positive or Affirmative and Privative or Negative. The following considerations will show the meaning of this division and its origin in the nature of Property.

Servitudes are limitations of, or deductions from, another person’s ownership or dominium. Dominium contains, among other elements, (A) certain powers of action (jus utendi), and (B) certain powers of exclusion (jus prohibendi). Restrictions on these powers will be (a) a certain necessitas non utendi, and (b) a certain necessitas patiendi. Correlative to these duties on the part of the owner of the servient tenement will be certain rights of the owner of the dominant tenement, viz. (α) a certain jus prohibendi, and (β) a certain jus utendi, or in other words, (α) a certain negative servitude, and (β) a certain affirmative servitude. As it happens that all the servitudes which public policy has recognized in relation to land are of an Affirmative character (except Si concedas mihi jus tibi non esse in fundo tuo aquam quaerere, minuendae aquae meae gratia, Dig. 8, 1, 15 pr. though, as Windscheid remarks, there is no reason why this should not also be an urban servitude—) and relate to some transient action (except Ut tugurium mihi habere liceret in tuo, scilicet si habeam pascui servitutem aut pecoris appellendi, ut, si hiems ingruerit, habeam quo me recipiam, Dig. 8, 3, 6, 1), they may be called jus faciendi: while those relating to houses are both Affirmative and Negative (jus prohibendi). Affirmative Urban servitudes, implying some permanent structure, may, in conformity with classical usage (e. g. jus tignum immissum habendi) for the sake of distinction from the Rural servitudes, be called jus habendi: they resemble them in the generic character that they are each a jus utendi.

(1) Instances of Rural servitude (jus faciendi) are iter, or jus eundi, right of way for beast and man on foot or on horseback over the servient tenement to the dominant tenement; actus or jus agendi, right of way for ordinary carriages (not for heavy-laden wagons); via (or jus vehendi?), right of paved way for heavy-laden wagons; aquae haustus, the right of drawing water from a private spring; aquae ductus, the right of conveying water over the servient tenement; pecoris ad aquam appulsus, the right of watering cattle; jus pecoris pascendi, the right of pasturing cattle; jus calcis coquendae, the right of burning lime; jus cretae eximendae, the right of quarrying for chalk; jus arenae fodiendae, the right of taking sand; jus silvae caeduae, the right of cutting wood in a wood suitable for the purpose.

(2) Instances of affirmative urban servitudes are jus tigni immittendi, the right of inserting a beam in a neighbour’s wall; jus oneris ferendi, the right of resting a weight on a neighbour’s wall or column (this servitude involves on the part of the servient owner the positive obligation of repairing the servient wall (refectio); whereas all other servitudes, as real rights, are contradistinguished from obligations or personal rights, by corresponding to the merely negative duty of abstention; cf. Windscheid, Pandekten, 1 § 211 a, note 3); jus protegendi, the right of projecting a roof over the soil of a neighbour; jus stillicidii recipiendi or avertendi or immittendi, the right of directing the rainfall on to a neighbour’s roof or area; jus cloacae immittendae, the right of making a sewer through the area of a neighbour; servitus luminum or jus luminis immittendi, the right of having a window in a neighbour’s wall; jus officiendi luminibus vicini, the reacquired right of an owner to diminish the light of a neighbour; jus altius tollendi, the reacquired right of an owner to increase the height of a structure, § 31; the right of storing fruit in his villa, ut fructus in vicini villa cogantur coactique habeantur; of placing quarried stones on his land, posse te cedere jus ei esse terram, rudus, saxa, jacere posita habere, et ut in tuum lapides provolvantur ibique positi habeantur, Dig. 8, 3, 3, 1 and 2. Vangerow holds that Aquaeductus, implying jus habendi, though it is servitus Rustica as to the land from which water is taken, is servitus Urbana as to the land over which water is conveyed.

(3) Instances of jus prohibendi are jus altius non tollendi, the right of forbidding a neighbour to raise the height of his buildings; jus ne prospectui officiatur, the right of having a prospect unintercepted; jus ne luminibus officiatur, the right of having the access of light to one’s windows obstructed; jus stillicidii non avertendi, the reacquired right of prohibiting my neighbour from discharging his rainfall into my area. Inst. 2, 3.

Personal servitudes (Inst. 2, 4 and 5) are rights of a less limited character in respect of user, but more restricted as to duration than praedial: instances are Habitatio, the right of occupying a house; Usus, the right of using a thing and consuming its immediate fruits or products, without the right of letting the thing or selling its products; of acquiring, in other words, its rent and profits, which may be regarded as its mediate or secondary fruits. Fructus, usually called Ususfructus, the further right of leasing the thing and selling its fruits. Habitatio, Usus, Ususfructus were usually, though not invariably, life interests, and, unlike real servitudes, implied Detention of the object; Possession of it, as opposed to Detention (4 §§ 138-170, comm.), remaining in the proprietor. For the modes of creating and vindicating servitudes, see §§ 28-33; 4 § 88, comm. Servitus was the only jus in re aliena belonging to jus civile. The other jura in re aliena, subsequently instituted, were pignus, superficies and emphyteusis.

Pignus or hypotheca, as developed by praetorian law, was the right of a creditor in a thing belonging to his debtor, maintainable against any one, in order to secure satisfaction of his debt. The praetorian action, by which the creditor could claim possession of the thing pledged, corresponding to the vindicatio of the owner, is called actio quasi Serviana in rem or hypothecaria. See 3 §§ 90, 91, comm.

Superficies is the right of a person who, having rented land for building on a long or perpetual lease, has built a house on it, which according to jus gentium, by the rule of Accession, is the property of the proprietor of the soil; cf. Inst. 2, 1, 29. The Praetor, however, recognized in the superficiarius a jus in re which he protected by an interdict de superficie and an actio in rem utilis.

Jus in agro vectigali or emphyteusis, as this species of right came to be called subsequently to the time of Gaius, from waste lands of the Emperor being let out under this kind of tenancy to be planted or cultivated, was a perpetual lease which transferred to the tenant or emphyteuta most of the rights of the owner. Accordingly he could maintain actio vectigalis in rem against any one to recover possession of the land thus leased to him. See 3 § 145. Although emphyteusis might be of unlimited duration, and was alienable without the consent of the owner, subject to his right of pre-emption, yet the owner had a right of recovering the land for breach of condition, or failing heirs of the emphyteuta, much as the feudal lord of a fee could recover the fief on forfeiture or escheat of the tenant, emphyteusis being even regarded by some as the model on which feudal tenure was instituted. This forfeiture or escheat to the lord of the fee makes property in land theoretically imperfect, like emphyteusis, falling short of ownership. Property in chattels, on the contrary, is not held of a superior, and, therefore, is absolute.

The Profits and Easements of English law generally correspond to the Servitutes of Roman law. But the principle: Servitutium non ea natura est ut aliquid faciat quis, sed ut aliquid patiatur aut non faciat, Dig. 8, 1, 15, 1: ‘Servitudes are not a right to a performance but to a permission or forbearance:’ would exclude from the class of Servitudes some members of the class of Profits; e. g. Rents, which are said to lie in render, i. e. to involve a performance of the party burdened, not in prender, i. e. not to consist in an act of the party entitled. Roman law adhered strictly to the principle that Real rights, or rights against the world, can only correlate to negative duties, duties of forbearance; and that rights correlating to positive obligations, or duties of performance, can only be Personal; i. e. can only regard a particular individual and his universal successors.

§§ 14 a-27. Having described the various kinds of real right (jus in rem), i. e. dominium and its fractions (jura in re), we proceed to the titles of real rights, that is to say, the events to which these rights are annexed by the law; in other words, the modes prescribed by the law by which such rights may be acquired; in other words, the legal definitions of the classes of persons in whom such rights are declared to be vested.

The Titles of real rights are divisible into Titles by which single real rights are acquired and Titles by which aggregates of rights (universitates jurum) are acquired.

Titles by which single real rights are acquired are divisible into Titles sanctioned by the civil law (jus civile) and Titles sanctioned by natural law (jus gentium, jus naturale), natural law denoting the rules of Roman law introduced by praetors, jurists and statutes, as consonant to the general reason of mankind.

Titles to ownership by civil law are mancipatio, in jure cessio, usucapio, and others which will be mentioned. Titles by natural law are traditio, occupatio, accessio, and others which will be mentioned, § 35. We commence with Titles by civil law.