With these data before us, we are able to note several remarkable points in which the Mancipatory Testament, as it may be called, differed in its primitive form from a modern will. As it amounted to a conveyance _out-and-out_ of the Testator's estate, it was not _revocable_. There could be no new exercise of a power which had been exhausted.
Again, it was not secret. The Familiæ Emptor, being himself the Heir, knew exactly what his rights were, and was aware that he was irreversibly entitled to the inheritance; a knowledge which the violences inseparable from the best-ordered ancient society rendered extremely dangerous. But perhaps the most surprising consequence of this relation of Testaments to Conveyances was the immediate vesting of the inheritance in the Heir. This has seemed so incredible to not a few civilians, that they have spoken of the Testator's estate as vesting conditionally on the Testator's death or as granted to him from a time uncertain, _i.e._ the death of the grantor. But down to the latest period of Roman jurisprudence there was a certain class of transactions which never admitted of being directly modified by a condition, or of being limited to or from a point of time. In technical language they did not admit _conditio_ or _dies_. Mancipation was one of them, and therefore, strange as it may seem, we are forced to conclude that the primitive Roman Will took effect at once, even though the Testator survived his act of Testation. It is indeed likely that Roman citizens originally made their Wills only in the article of death, and that a provision for the continuance of the Family effected by a man in the flower of life would take the form rather of an Adoption than of a Will. Still we must believe that, if the Testator did recover, he could only continue to govern his household by the sufferance of his Heir.
Two or three remarks should be made before I explain how these inconveniences were remedied, and how Testaments came to be invested with the characteristics now universally associated with them. The Testament was not necessarily written: at first, it seems to have been invariably oral, and, even in later times, the instrument declaratory of the bequests was only incidentally connected with the Will and formed no essential part of it. It bore in fact exactly the same relation to the Testament, which the deed leading the uses bore to the Fines and Recoveries of old English law, or which the charter of feoffment bore to the feoffment itself. Previously, indeed, to the Twelve Tables, no writing would have been of the slightest use, for the Testator had no power of giving legacies, and the only persons who could be advantaged by a will were the Heir or Co-heirs. But the extreme generality of the clause in the Twelve Tables soon produced the doctrine that the Heir must take the inheritance burdened by any directions which the Testator might give him, or in other words, take it subject to legacies. Written testamentary instruments assumed thereupon a new value, as a security against the fraudulent refusal of the heir to satisfy the legatees; but to the last it was at the Testator's pleasure to rely exclusively on the testimony of the witnesses, and to declare by word of mouth the legacies which the _familiæ emptor_ was commissioned to pay.