[ULPIANUS libro quadragesimo quinto ad edictum. ] §26.2.22.prSi quis tutorem dederit filio suo seruum, quem putabat liberum esse, cum esset seruus, is neque liber neque tutor erit.
[ULPIAN, from the forty-fifth book on the Edict.] If anyone has appointed as tutor to his son a slave whom he believed to be free, whereas he was a slave, that person will be neither free nor a tutor.