*The codification of the law.* About the middle of the fifth century the plebeians secured the codification and publication of the law. Hitherto the law, which consisted essentially of customs and precedents, and was largely sacral in character, had been known only to the magistrates and to the priests, that is to members of the patrician order. At this time, two commissions of ten men each, working in successive years (444–2?) drew up these customs into a code, which, with subsequent additions, formed what was later called the Law of the XII Tables. This code was in no sense a constitution, but embodied provisions of both civil and criminal law, with rules for legal procedure and police regulations. Notable is the provision which guaranteed the right of appeal to the Assembly of the Centuries in capital cases. *Development of the tribunate and the comitia tributa.* The years which saw the publication of the code mark an important stage in the struggle of the orders. Serious trouble arose between the patricians and the plebs under the second college of law-givers, and the difference was only settled by a treaty which restored the tribunate, that had been suspended when the decemvirs were first elected. Henceforth the number of tribunes was ten instead of four and their position and powers received legal recognition from the patricians. From this time on, too, the _comitia tributa_, now embracing all the tribes, the rural as well as the urban, was a regular institution of the state. The Assembly of the Tribes was originally, and perhaps always remained in theory, restricted to the plebeians. And it is improbable that the patricians ever sought to participate in it. At any rate, there is no adequate reason for believing in the existence of two assemblies of this sort, the one composed of both patricians and plebeians and the other of plebeians only. The Assembly of the Tribes not only elected the plebeian tribunes and aediles, but soon chose the quaestors also. Furthermore, the patrician magistrates, finding this Assembly in many ways more convenient for the transaction of public business than the Assembly of the Centuries which met in the Campus Martius outside the _pomerium_ and required more time to register its opinion because of the greater number of voting units, began to convene it to approve measures, which, if previously sanctioned by a decree of the Senate, became law. The tribunes likewise presented resolutions to the Assembly of the Tribes, and these, too, if sanctioned by the Senate, were binding on the whole community. Such laws were called plebiscites (_plebi scita_) in contrast with the _leges_ passed by an assembly presided over by a magistrate with _imperium_. It became the ambition of the tribunes to obtain for their plebiscites the force of law without regard to the Senate’s approval.