Ad Quintum Mucium libri
Ex libro XII
Dig. 40,12,28Pomponius libro duodecimo ad Quintum Mucium. Non videtur domini voluntate servus in libertate esse, quem dominus ignorasset suum esse: et est hoc verum: is enim demum voluntate domini in libertate est, qui possessionem libertatis ex voluntate domini consequitur.
Pomponius, On Quintus Mucius, Book XII. A slave is not considered to be at liberty with the consent of his master when the latter does not know that he belongs to him. This is perfectly true; for the slave is only at liberty under such circumstances when he acquires possession of freedom with his master’s consent.