[PAULUS libro uicesimo ad edictum. ] §5.3.38.prPlane in ceteris necessariis et utilibus impensis posse separari, ut bonae fidei quidem possessores has quoque imputent, praedo autem de se queri debeat, qui sciens in rem alienam impendit.
[PAULUS in his twentieth book on the Edict.] Clearly, in the case of other necessary and useful expenses, a distinction can be made, so that bona fide possessors may charge these as well, whereas a robber ought to complain of himself, since he made the expenditure knowing it to be another's property.
sed benignius est in huius quoque persona haberi rationem impensarum (non enim debet petitor ex aliena iactura lucrum facere) et id ipsum officio iudicis continebitur: nam nec exceptio doli mali desideratur.
But it is more benign that in his case too account should be taken of expenses (for the plaintiff ought not to profit from another's loss), and this very matter will be included in the office of the judge: for not even a plea of fraud is required.
plane potest in eo differentia esse, ut bonae fidei quidem possessor omnimodo impensas deducat, licet res non exstet in quam fecit, sicut tutor uel curator consequuntur, praedo autem non aliter, quam si res melior sit.
Clearly, there can be a difference in this respect: that a bona fide possessor may deduct his expenses in any event, even if the thing on which he incurred them no longer exists, just as a tutor or curator recovers them, whereas a robber may do so only if the thing has been made better.