[PAULUS libro nono ad edictum. ] §3.5.17.prProculus et Pegasus bonam fidem eum, qui in seruitute gerere coepit, praestare debere aiunt: ideoque quantum, si alius eius negotia gessisset, seruare potuisset, tantum eum, qui a semet ipso non exegerit, negotiorum gestorum actione praestaturum, si aliquid habuit in peculio, cuius retentione id seruari potest.
[PAULUS, on the Edict, book nine] Proculus and Pegasus say that a person who began to manage affairs while in slavery must practice good faith; and therefore, that one who has not exacted it from himself will, in an action for business management, have to make good as much as could have been recovered if someone else had managed his affairs, provided that he had something in his peculium, by the retention of which that amount could be recovered.
idem Neratius.
Neratius is of the same opinion.