The obligatio literis was a written acknowledgment of debt, chiefly employed when money was borrowed; but the creditor could not sue upon a note within two years from its date, without being called upon also to prove that the money was in fact paid to the debtor.
Contracts perfected by consent, consensu, had reference to sale, hiring; partnership, and mandate, or orders to be carried out by agents. All contracts of sale were good without writing.
Acts which caused damage to another opened a new class of cases. The law obliged the wrong-doer to make reparation, and this responsibility extended to damages arising not only from positive acts, but from negligence or imprudence. In cases of libel or slander, the truth of the allegation might be pleaded in justification. In all cases it was necessary to show that an injury had been committed maliciously; but if damage arose in the exercise of a right, as killing a slave in self-defence, no claim for reparation could be maintained. If any one exercised a profession or trade for which he was not qualified, he was liable to all the damage his want of skill or knowledge might occasion,a provision that some of our modern laws might advantageously revive. When any damage was done by a slave or an animal, the owner of the same was liable for the loss, though the mischief was done without his knowledge and against his will. If anything was thrown from a window giving on the public thoroughfare so as to injure any one by the fall, the occupier was bound to repair the damage, though done by a stranger. Legal claims might be transferred to a third person by sale, exchange, or donation; but to prevent speculators from purchasing debts at low prices, it was ordered that the assignee should not be entitled to exact from the debtor more than he himself had paid to acquire the debt, with interest,a wise and just regulation.
By the ancient constitution, the king had the prerogative of determining civil causes. The right then devolved on the consuls, afterward on the praetor, and in certain cases on the curule and plebeian ediles, who were charged with the internal police of the city.
The praetor, a magistrate next in dignity to the consuls, acted as supreme judge of the civil courts, assisted by a council of jurisconsults to determine questions in law. At first one praetor was sufficient, but as the limits of the city and empire extended, he was joined by a colleague. After the conquest of Sicily, Sardinia, and the two Spains, new praetors were appointed to administer justice in the provinces. The praetor held his court in the comitium, wore a robe bordered with purple, sat in a curule chair, and was attended by lictors.
The praetor delegated his power to three classes of judges, called respectively judex, arbiter, and recuperator. When parties were at issue about facts, it was the custom for the praetor to fix the question of law upon which the action turned, and then to remit to a delegate, or judge, to inquire into the facts and pronounce judgment according to them. In the time of Augustus there were four thousand judices, who were merely private citizens, generally senators or men of consideration. The judex was invested by the magistrate with a judicial commission for a single case only. After being sworn to duty, he received from the praetor a formula containing a summary of all the points under litigation, from which he was not allowed to depart. He was required not merely to investigate facts, but to give sentence; and as law questions were more or less mixed up with the case, he was allowed to consult one or more jurisconsults. If the case was beyond his power to decide, he could decline to give judgment. The arbiter, like the judex, received a formula from the praetor, and seemed to have more extensive power. The recuperators heard and determined cases, but the number appointed for each case was usually three or five.
The centumvirs constituted a permanent tribunal composed of members annually elected, in equal numbers, from each tribe; and this tribunal was presided over by the praetor, and divided into four chambers, which under the republic was placed under the ancient quaestors. The centumvirs decided questions of property, embracing a wide range of subjects. The Romans had no class of men like the judges of modern times; the superior magistrates were changed annually, and political duties were mixed with judicial. The evil was partially remedied by the institution of legal assessors, selected from the most learned jurisconsults. Under the empire the praetors were greatly increased; under Tiberius there were sixteen who administered justice, besides the consuls, six ediles, and ten tribunes of the people. The Emperor himself became the supreme judge, and he was assisted in the discharge of his judicial duties by a council composed of the consuls, a magistrate of each grade, and fifteen senators. At first, the duties of the praetorian prefects were purely military, but finally they discharged important judicial functions. The prefect of the city, in the time of the emperors, was a great judicial personage, who heard appeals from the praetors themselves.
In all cases brought before the courts, the burden of proof was with the party asserting an affirmative fact. Proof by writing was generally considered most certain, but proof by witnesses was also admitted. Pupils, lunatics, infamous persons, interested parties, near relatives, and slaves could not bear evidence, nor any person who had a strong enmity against either party. The witnesses were required to give their testimony on oath. In most cases two witnesses were enough to prove a fact. When witnesses gave conflicting testimony, the judge regarded those who were most worthy of credit rather than those who were most numerous. In the English courts the custom used to be as with the Romans, of refusing testimony from those who were interested; but this has been removed. On the failure of regular proof, the Roman law allowed a party to refer the facts in a civil action to the oath of his adversary.
Under the Roman republic there was no appeal in civil suits, but under the emperors a regular system was established. Under Augustus there was an appeal from all the magistrates to the prefect of the city, and from him to the praetorian prefect or even to the Emperor. In the provinces there was an appeal from the municipal magistrates to the governors, and from them to the Emperor, as Paul appealed from Festus to Caesar. Under Justinian no appeal was allowed from a suit which did not involve at least twenty pounds in gold.
In regard to criminal courts among the Romans during the republic, the only body which had absolute power of life and death was the comitia centuriata. The senate had no jurisdiction in criminal cases, so far as Roman citizens were concerned. It was only in extraordinary emergencies that the senate, with the consuls, assumed the responsibility of inflicting summary punishment. Under the emperors, the senate was armed with the power of criminal jurisdiction; and as the senate was the tool of the imperator, he could crush whomsoever he pleased.
As it was inconvenient, when Rome had become a very great city, to convene the comitia for the trial of offenders, the expedient was adopted of delegating the jurisdiction of the people to persons invested with temporary authority, called quaestors. These were finally established into regular and permanent courts, called quaestores perpetui. Every case submitted to these courts was tried by a judge and jury. It was the duty of the judge to preside and regulate proceedings according to law; and it was the duty of the jury, after hearing the evidence and pleadings, to decide on the guilt or innocence of the accused. As many as fifty persons frequently composed the jury, whose names were drawn out of an urn. Each party had a right to challenge a certain number, and the verdict was decided by a majority of votes. At first the judices were chosen from the senate, and afterward from the equestrians, and then again from both orders. But in process of time the quaestores perpetui gave place to imperial magistrates. The accused defended himself in person or by counsel.