[IDEM libro secundo ad Sabinum. ] §28.5.2.prCirca eos, qui ita heredes instituti sint: 'ex partibus quas adscripsero', non putat Marcellus eos heredes nullis adscriptis partibus, quemadmodum si ita essent heredes instituti: 'si eis partes adscripsero'.
[THE SAME, from the second book on Sabinus.] Regarding those who have been instituted heirs in this way: 'from the shares which I shall have written down,' Marcellus does not think they are heirs if no shares have been written down, just as if they had been instituted heirs in this way: 'si eis partes adscripsero' (if I shall have written down shares for them).
sed magis est, ut sic utraque institutio accipiatur, si uoluntas defuncti non refragatur: 'ex quibus partibus adscripsero, si minus, ex aequis', quasi duplici facta institutione: quam sententiam Celsus libro sexto decimo digestorum probat.
But it is more acceptable that both institutions be understood in this way, if the will of the deceased does not oppose it: 'from the shares which I shall have written down, and if not, from equal shares,' as if a double institution had been made; which opinion Celsus approves in the sixteenth book of his Digests.
aliter atque probat in illa institutione: 'ex qua parte me Titius heredem scripsit, Seius heres esto': tunc enim si non est a Titio scriptus, nec Seius ab eo, nec immerito: hic enim creditur inesse condicio.
It is otherwise than what he approves in that institution: 'from whatever share Titius has written me down as heir, let Seius be heir'; for in that case, if he has not been written down by Titius, Seius is not written down by him either, and not undeservedly; for a condition is believed to be inherent here.
sed Marcellus haec similia putat.
But Marcellus thinks these cases are similar.
§28.5.2.1Potest autem interesse, utrum ita quis scribat: 'ex his partibus quas adscripsi' an 'adscripsero', ut superiori modo dicas nullis adscriptis partibus nullam esse institutionem: quomodo in illo Marcellus: 'ex his partibus, ex quibus testamento matris scripti fuissent, 'heredes sunto', si intestata mater decesserit, hos non esse institutos.
However, it can make a difference whether someone writes thus: 'from these shares which I have written down' or 'which I shall have written down,' so that in the former case you would say that if no shares have been written down, the institution is void; just as Marcellus says in that case: 'let them be heirs from those shares in which they should have been written down in their mother's will,' if the mother died intestate, these persons are not instituted.