The earlier history of Rome leaves no doubt that before the Republic fell these laws were carried out with inhuman severity. With the growth of Rome into a world power and the consequent rise of humanitarianism[202] a strong public feeling against gratuitous cruelty towards slaves sprang up. This may be illustrated by an event which happened in the reign of Nero, in the year 58, when a riot ensued out of sympathy for some slaves who had been condemned _en masse_ after their master had been assassinated by one of them.[203] Measures were gradually introduced for alleviating the hardships and cruelties of slavery. Claudius (41-54 A.D.) ordained[204] that since sick and infirm slaves were being exposed on an island in the Tiber sacred to Aesculapius, because their masters did not wish to bother about attending them, all those who were so exposed were to be set free if they recovered and never to be returned into the power of their masters; and if any owner preferred to put a slave to death rather than expose him, he was to be held for murder. Gentlemen began to speak with contempt of a master or mistress who maltreated slaves.[205] Hadrian (117-138 A.D.) modified the old laws to a remarkable degree: he forbade slaves to be put to death by their masters and commanded them to be tried by regularly appointed judges; he brought it about that a slave, whether male or female, was not to be sold to a slave-dealer or trainer for public shows without due cause; he did away with _ergastula_ or workhouses, in which slaves guilty of offences were forced to work off their penalties in chains and were confined to filthy dungeons; and he modified the law previously existing to the extent that if a master was killed in his own house, the inquisition by torture could not be extended to the whole household, but to those only who, by proximity to the deed, could have noticed it.[206] Gaius observes[207] that for slaves to be in complete subjection to masters who have power of life and death is an institution common to all nations, "But at this time," he continues, "it is permitted neither to Roman citizens nor any other men who are under the sway of the Roman people to vent their wrath against slaves beyond measure and without reason. In fact, by a decree of the sainted Antoninus (138-161 A.D.) a master who without cause kills his slave is ordered to be held no less than he who kills another's slave.[208] An excessive severity on the part of masters is also checked by a constitution of the same prince. On being consulted by certain governors about those slaves who rush for refuge to the shrines of the gods or the statues of emperors, he ordered that if the cruelty of masters seemed intolerable they should be compelled to sell their slaves." Severus ordained that the city prefect should prevent slaves from being prostituted[209]. Aurelian gave his slaves who had transgressed to be heard according to the laws by public judges[210].