The second great victory won by the plebeians was in the passage of the Publilian Law in 471 B.C. This law was proposed by the tribune Valerius Publilius, and was brought about by the murder of the tribune Gnæus Genucius. The main object of this law was the protection of the plebeian assembly and the plebeian officers, but its exact details are unknown. It is believed by some that the comitia tributa really came into existence with this law, and that previously the plebeians had voted by curies. The law limited to plebeian freeholders the right to vote in a plebeian assembly, and excluded nearly all the freedmen and clients who were under the influence of the patricians as well as the patricians themselves. It is possible also that the increase in the number of the tribunes from two to five was made by this law. In 462 B.C. an unsuccessful attempt was made to abolish the office of tribune; in 457 B.C. came the increase from five tribunes to ten. From 451 to 450 B.C. the regular system of government at Rome was interrupted by the election and rule of the _decemvirs_. The episode of these decemvirs has an important place in Roman history; but (as is the case with all events in Roman history in the fifth century before Christ) our knowledge of these men, of their work, and of their overthrow is very uncertain. The election of these officials was primarily brought about by the recognized necessity for a reform and codification of the Roman laws. If the duties of these men had been limited to the preparation of such code, its character and position would not have been unsimilar to that of numerous other bodies of men appointed for a similar purpose in many countries and in all ages. But the peculiarity about the work of the decemvirs lies in the fact that upon their appointment all the ordinary Roman offices were discontinued and the entire judicial and executive administration of the state passed into the hands of the decemvirs. During their first year of office the decemvirs drew up ten tables of laws, so called because the laws were engraved upon tables of copper and stood up in the Forum on the rostra in front of the Senate house. According to the legends (for the Roman historical records of this century are little more than such), it had originally been intended to intrust the decemvirs with power only for a single year, but their work being incomplete at the expiration of the first year, they were chosen for a second year. It is uncertain whether the decemvirs for the second year were exactly the same men as those for the first year. According to some reports some of the decemvirs of the second year were plebeians, while none of those originally elected belonged to that order.