Testament, the very improvements which the Prætor may have concurrently carried out in Equity. These last ameliorations depend, however, on mere legal dexterity, and we see accordingly that the Testamentary Law of the day of Gaius or Ulpian is only transitional. What changes next ensued we know not; but at length just before the reconstruction of the jurisprudence by Justinian, we find the subjects of the Eastern Roman Empire employing a form of Will of which the pedigree is traceable to the Prætorian Testament on one side, and to the Testament "with the copper and the scales" on the other. Like the Testament of the Prætor, it required no Mancipation, and was invalid unless sealed by seven witnesses. Like the Mancipatory Will, it passed the Inheritance and not merely a Bonorum Possessio. Several, however, of its most important features were annexed by positive enactments, and it is out of regard to this threefold derivation from the Prætorian Edict, from the Civil Law, and from the Imperial Constitutions, that Justinian speaks of the Law of Wills in his own day as Jus Tripertitum. The new Testament thus described is the one generally known as the Roman Will. But it was the Will of the Eastern Empire only; and the researches of Savigny have shown that in Western Europe the old Mancipatory Testament, with all its apparatus of conveyance, copper, and scales, continued to be the form in use far down in the Middle Ages.
