Regularum libri
Ex libro I
Marcianus, Rules, Book I. Where a slave is forbidden by the testator to render an account, it does not follow that, by not being obliged to do so, he can obtain for his own benefit what may be in his hands; but, in order to avoid a too rigid examination being made, that is to say, that the slave may not be held accountable for negligence, but only for fraud. Therefore, his peculium is not considered to have been bequeathed to a manumitted slave merely for the reason that he is prohibited from rendering an account.
Marcianus, Rules, Book IV. The Divine Pius and the Divine Brothers stated beneficently in a Rescript that where a slave, who was appointed a substitute, had been bequeathed a legacy, together with his freedom, in case he should not be an heir, but the bequest of his freedom was not repeated, the result would be the same as if this had been done.