was further modified by the influence of tile practor, especially in the direction of recognition of fideicommissa similar in some respects to testamentary trusts. Codicilli, or informal wills, also came into use and were sufficient for almost every purpose except for appointing an heir. In the time of Justinian a will founded partly on the jus civile, partly on the edict of the praetor, partly on imperial constitutions and so called testamentum tripertitum, was generally in use. The main points essential to its validity were that the testator should possess testamentary capacity, and that the will should be signed or acknowledged by the testator in the presence of seven witnesses, or published orally in open court. The witnesses must be idonei, or free from legal disability. For instance, women and slaves were not good witnesses. The whole property of the testator could not be alienated. The rights of heirs and descendants were protected by enactments which secured to them a legal minimum, the querela inofficiosi testamenti being the remedy of those passed over. The age at which testamentary capacity began was fourteen in the case of males, twelve in the case of females. Up to 439 A.D. a will must have been in Latin; after that date Greek was allowed. Certain persons, especially soldiers, were privileged from observing the ordinary forms. The liability of the heir to the debts of the testator varied during different periods. At first it was practically unlimited. The law was then gradually modified in favour of the heir, until in the time of Justinian the heir who duly made an inventory of the property of the deceased was liable only for the assets to which he had succeeded. This limitation of liability is generally termed by the civilians beneficium inventarii. Something like the English probate is to be found in the rules for breaking the seals of a will in presence of the praetor. Closely connected with the will was the donatio mortis causa, the rules of which have been as a whole adopted in England (see below). An immense space in the Corpus juris is occupied with testamentary law. The whole of part v. of the Digest (books xxviii.-xxxvi.) deals with the subject, and so do a large number of constitutions in the Code and Novels. Influence of Christianity In Christian tradition, Eusebius and others have related of Noah's testament, made in writing, and