[MARCIANUS libro quarto institutionum. ] §29.2.52.prCum heres institutus erat filius et habebat patrem furiosum, in cuius erat potestate, interponere se suam beniuolentiam diuus Pius rescripsit, ut, si filius familias adierit, perinde habeatur atque si pater familias adisset, permisitque ei et seruos hereditatis manumittere.
[MARCIANUS, in the fourth book of Institutions.] When a son had been designated as heir and had an insane father in whose power he was, the divine Pius wrote in a rescript that he interposed his benevolence so that, if the filius familias entered upon the inheritance, it should be held just as if a pater familias had entered, and he also permitted him to manumit the slaves of the inheritance.
§29.2.52.1Qui ex parte heres institutus est pure, ex parte sub condicione solus, etiam pendente condicione, si adierit hereditatem, ex asse heres erit, quia solus heres futurus est omnimodo, nisi habeat in condicionalem partem substitutum.
A person who has been designated as sole heir, partly unconditionally and partly under a condition, will, even while the condition is pending, if he enters upon the inheritance, be the heir to the whole estate, because he is in any event going to be the sole heir, unless he has a substitute designated for the conditional part.