[PAULUS libro nono ad Sabinum. ] §47.2.20.prCum aes pignori datur, etiamsi aurum esse dicitur, turpiter fit, furtum non fit.
[PAULUS in the ninth book on Sabinus.] When bronze is given in pledge, even if it is said to be gold, a base act is committed, but theft is not committed.
sed si datum est aurum, deinde, cum dixisset se ponderare aut obsignare uelle, aes subiecit, furtum fecit: rem enim pignori datam interuertit.
But if gold was given, and then, after he had said that he wished to weigh or seal it, he substituted bronze, he has committed theft; for he has embezzled the thing given in pledge.
§47.2.20.1Si bona fide rem meam emeris eamque ego subripuero, uel etiam tuus usus fructus sit et eam contrectauero, tenebor tibi furti actione, etsi dominus rei sum.
If you should buy my property in good faith and I take it away surreptitiously, or even if the usufruct is yours and I lay hands on it, I shall be liable to you in an action for theft, even though I am the owner of the property.
sed his casibus usucapio quasi furtiuae rei non impedietur, quoniam et si alius subripiat et in meam potestatem reuersa res fuerit, usucapiebatur.
But in these cases, usucapion will not be prevented as if of a stolen thing, since even if another should steal it and the thing has returned into my power, it was capable of being acquired by usucapion.