to retain (freely and quietly, properly and peacefully) what we do possess. For  the restoration of possession, process is by action; for its retention it is twofold,  exception or interdict. An exception is given for many reasons.16
How possession is divided.
 Possession is divided into civil and natural possession. Civil is that retained by  intention alone, natural by physical occupation, and [thus] it is sometimes rightful,  sometimes wrongful.17 One may possess in both ways, animo and corpore, [or in  either, but] one cannot acquire possession except both animo and corpore, neither  corpore alone nor animo alone.18 And just as it cannot be acquired except animo  and corpore, so it cannot be lost unless both [are lost],19 and, since it is acquired  by both, though it is lost corpore it may be retained by intention alone. Some  possession is rightful, some wrongful, as may be seen below in the tractate on the  assise of novel disseisin.20 Some genuine, some imaginary, colored or fictitious:  imaginary, as where one conducts himself as if he possessed when another [in fact]  possesses. Some possession is bare, some clothed by a vestment: bare, as where  one has no right in a thing, not the slightest spark of right, only a bare physical  entry; clothed, [as where one's possession is clothed] by right, title or time. Some  possession is [already] acquired, some to be acquired; 21some already attained,  some to be attained,22 some valid and strong, some bare and weak. Some possession  is one's own, some that of another. Of the possession of others, some is near and  some remote. Some possession is ancient, some recent and new. There is possession  which has nothing of right but something of possession, as where one is in possession  by intrusion.23 There is another kind that has something of possession but nothing  of right, as where one is in possession as guardian or creditor and the like. There is  another that has a good deal of possession [but] little of right, as the possession of  an ancestor, [recovered] in a possessory action, where another has the mere  right and the ancestor the fee and free tenement. And another that has a great  deal of possession and something of right, where [the possessory action] is changed  [into a] proprietary one, as where one holds for a term of life or years.24 There is  also possession that has much of possession and much of right, as where in some  thing one has the mere right and the