have fragments preserved in the Vatican Library. They contained both branches of law, extracts from the jurists Ulpian, Paul, and Papinian, as well as Constitutions of the Emperors.
At length the need of an authoritative statement of laws in force was so strongly felt that the matter was taken up by government. Theodosius II, son of the Emperor Arcadius, having previously taken steps to organise public teaching in Constantinople, determined to meet the uncertainties of the law courts by giving imperial authority to certain text writers and by a new collection of the Statute Law. The books of the great lawyers, Papinian, Paul, and Ulpian and of a pupil of Ulpian, Modestinus, were well known and in general use. Another lawyer rather earlier than these, of whom we really know nothing, except his name (and that is only a praenomen), Gaius, had written in the time of Marcus Antoninus in very clear style a manual, besides other works of a more advanced character. The excellence of this manual brought it into general use and secured for its author imperial recognition on a level with the lawyers first named. Another work in great general use was a brief summary of the law by Paul known under the name of Pauli Sententiae. All these lawyers were in the habit of citing the opinions of earlier lawyers and often inserting extracts from them in their own works. Theodosius (with Valentinian, then seven years old) in A.D. 426 addressed to the Senate of Rome an important and comprehensive Constitution, intended to put what may be called the Common Law of Rome on a surer footing. He confirmed all the writings of Papinian, Paul, Gaius, Ulpian, and Modestinus, and added to them all the writers whose discussions and opinions were quoted by these lawyers, mentioning particularly Scaevola, Sabinus, Julian, and Marcellus. The books of the five lawyers first named were no doubt in the hands of judges and advocates generally, but the books of the others would be comparatively rare, and a quotation from them would be open to considerable doubt. It might contain a wrong reading or an interpolation or even a forgery. Theodosius therefore directed that these older books should be admitted as authorities, only so far as they were confirmed by a comparison with manuscripts other than that produced by the advocate or other person alleging their authority.
But Theodosius went further. If the writers thus authoritatively recognised were found to differ in opinion, the judge was directed to follow the opinion of the majority, and if the numbers on each side were equal, to follow the side on which Papinian stood and disregard any notes of Paul or Ulpian contesting Papinian's opinion, but Paul's Sententiae were always to count. If Papinian's opinion was not there to decide between equal numbers of authorities, the judge must use his own discretion.
The great portion of law which had been set forth in text-books as reasonable and conformable to precedent and statute having thus been sanctioned, and rules given for its application, Theodosius turned his attention to the Statute Law itself. The jurists had in their various
