Quintilian Institutio Oratoria 7.2.26

[26] There is yet another type of case which, though not one of mutual accusation, is treated in the same way: I mean a case in which we enquire, without accusing anyone, which of two acts has taken place. For both parties make and defend their own statement of the case. Thus in the suit concerning the estate of Urbinia ¹ the claimant says that Clusinius Figulus, the son of Urbinia, on the defeat of the army in which he was serving, fled and after various misfortunes, being even even kept in captivity by the king, at length returned to Italy and his own home in the Marrucine district, where he was recognised. To this Pollio replies that he had been a slave to two masters at Pisaurum, that he had practised medicine, and finally, after receiving his freedom, inserted himself into a gang of slaves who were for sale ² and was at his own request purchased by himself.