[AFRICANUS libro septimo quaestionum. ] §41.4.11.prQuod uolgo traditum est eum, qui existimat se quid emisse nec emerit, non posse pro emptore usucapere, hactenus uerum esse ait, si nullam iustam causam eius erroris emptor habeat: nam si forte seruus uel procurator, cui emendam rem mandasset, persuaserit ei se emisse atque ita tradiderit, magis esse, ut usucapio sequatur.
[AFRICANUS, from his seventh book of Questions.] The common tradition that a person who thinks he has bought something, when he has not bought it, cannot acquire it by usucapion as a purchaser, is true only so far, he says, as the purchaser has no just cause for his error; for if, by chance, a slave or an agent, to whom he had commissioned the purchase of a thing, should persuade him that he has bought it, and deliver it to him on that basis, it is more correct to say that usucapion follows.