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. The Romans divided _crimes_ into public and private. Private crimes could be prosecuted only by the party injured, and were generally punished by pecuniary fines, as among the old Germanic nations. Of public crimes the _crimen laesae majestatis_, or treason, was regarded as the greatest; and this was punished with death and with confiscation of goods, while the memory of the offender was declared infamous. Greater severity could scarcely be visited on a culprit. Treason comprehended conspiracy against the government, assisting the enemies of Rome, and misconduct in the command of armies. Thus Manlius, in spite of his magnificent services, was hurled from the Tarpeian Rock, because he was convicted of an intention to seize upon the government. Under the empire not only any attempt on the life of the Emperor was treason, but disrespectful words or acts. The criminal was even tried after death, that his memory might become infamous; and this barbarous practice was perpetuated in France and Scotland as late as the beginning of the seventeenth century. In England men have been executed for treasonable words. Besides treason there were other crimes against the State, such as a breach of the peace, extortion on the part of provincial governors, embezzlement of public property, stealing sacred things, bribery,--most of which offences were punished by pecuniary penalties.