[POMPONIUS libro tertio ad Sabinum. ] §28.6.16.prSi quis eum, quem testamento suo legauit, rursus a substituto filii liberum esse iusserit, liber erit quasi legato adempto: nam et in legato in his testamentis nouissima scriptura erit spectanda, sicut in eodem testamento (uel testamento et codicillis confirmatis) obseruaretur.
[POMPONIUS, Book 3 on Sabinus.] If anyone has ordered a person, whom he bequeathed in his own testament, to be set free again by the substitute of his son, he will be free as if the legacy had been revoked; for in the case of a legacy in these testaments, the latest writing must be regarded, just as would be observed in the same testament (or in a testament and confirmed codicils).
§28.6.16.1Si suo testamento perfecto alia rursus hora pater filio testamentum fecerit adhibitis legitimis testibus, nihilo minus id ualebit et tamen patris testamentum ratum manebit.
If, after his own testament has been completed, a father at another hour again has made a testament for his son, with legitimate witnesses called, this will nevertheless be valid, and yet the father's testament will remain ratified.
nam et si sibi et filio pater testamentum fecisset, deinde sibi tantum, utrumque superius rumpetur.
For even if a father had made a testament for himself and his son, and then for himself only, both of the prior testaments will be revoked.
sed si secundum testamentum ita fecerit pater, ut sibi heredem instituat, si uiuo se filius decedat, potest dici non rumpi superius testamentum, quia secundum non ualet, in quo filius praeteritus sit.
But if the father has made a second testament in such a way as to institute an heir for himself if his son should die while he is alive, it can be said that the prior testament is not revoked, because the second one, in which the son has been passed over, is not valid.