=35.= The wealth of Rome hitherto had been chiefly derived from the products of the soil. The lands west of the Tiber were now lost, and all the rural district was open to invasion. Crops were ruined, farm buildings destroyed, cattle driven away. At the same time, through the losses and necessities of the government, taxes were greatly increased; and these were levied, not upon the reduced value of the property, but upon the scale of former assessments. To meet their dues, the poor were obliged to borrow money, at enormous rates of interest, from the rich. The nobles seized the opportunity to enforce to their full extent the cruel laws concerning debt, and the sufferings of the insolvent grew too grievous to be borne. Many sold themselves as slaves to discharge their obligations. Those who refused thus to sign away their own and their children’s liberty were often imprisoned, loaded with chains, and starved or tortured by the cruelty of their creditors. The patrician castles, which commanded the hills of Rome, contained gloomy dungeons, which were the scenes of untold atrocities toward such as had the misfortune to incur the wrath of their owners. =36.= Fifteen years after the expulsion of the kings, the plebeians, wearied out with a government which existed only for the rich, and imposed all its burdens on the poor, withdrew in a body to a hill beyond the Anio, and declared their intention of founding a new city, where they might govern themselves by more just and equal laws, B. C. 494. The patricians now perceived that they had gone too far. However much they hated the people, they had no idea of losing their services. They yielded, therefore, and received back the seceded plebeians on their own conditions. These were: (1.) Cancellation of claims against insolvent debtors; (2.) Liberation of all such who had been imprisoned or enslaved; (3.) Annual election of two _Tribunes_, whose duty it should be to defend the interests of the commons. The number of these officers was soon raised to five, and eventually to ten. Two plebeian _Æ´diles_ were at the same time appointed, and charged with the superintendence of streets, buildings, markets, and public lands; of the public games and festivals, and of the general order of the city. They were judges in cases of small importance, like those of modern police courts; and they were eventually intrusted with the keeping of the decrees of the Senate, which had sometimes been tampered with by the patrician magistrates.