[POMPONIUS libro trigensimo secundo ad Sabinum. ] §41.3.32.prSi fur rem furtiuam a domino emerit et pro tradita habuerit, desinet eam pro furtiua possidere et incipiet pro suo possidere.
[POMPONIUS, On Sabinus, book 32] If a thief purchases the stolen thing from its owner and holds it as delivered, he will cease to possess it as stolen and will begin to possess it as his own.
§41.3.32.1Si quis id, quod possidet, non putat sibi per leges licere usucapere, dicendum est, etiamsi erret, non procedere tamen eius usucapionem, uel quia non bona fide uideatur possidere uel quia in iure erranti non procedat usucapio.
If someone does not think that it is permitted for him by law to acquire by usucapion that which he possesses, it must be said that, even if he is in error, his usucapion nevertheless does not proceed, either because he does not seem to possess in good faith, or because usucapion does not proceed for one who is in error on a point of law.
§41.3.32.2Incertam partem possidere nemo potest: ideo si plures sint in fundo, qui ignorent, quotam quisque partem possideat, neminem eorum mera suptilitate possidere Labeo scribit.
No one can possess an uncertain share; therefore, if there are several persons on a piece of land who do not know what share each of them possesses, Labeo writes that by strict interpretation none of them possesses.