It remains yet to consider briefly an institution which, while not peculiar to Rome, was, nevertheless, here characterized by some features that were unique in their influences for evil. Slavery rested like a horrible incubus upon the ancient world, though few persons seem to have been aware of it. It placed a curse upon labor and almost prevented the development of the mechanic arts. It seriously impeded the growth of the moral sentiments by the hindrances it placed in the way of free discussion, and by the opportunities it afforded the basely inclined for the gratification of carnal lusts. It placed a large part of the population virtually beyond the range of human sympathy by branding the expression of such sympathy as a symptom of treason. While it did these things everywhere, in Rome it made a people that were naturally coarse and brutal still more so, by placing within the easy reach of every slave-owner helpless objects upon which he could vent his rage, and whose services he could exploit in the most unfeeling manner. A lurid light is thrown on the barbarity of the Romans toward their slaves by an occurrence that took place in the later years of Seneca. A plain statement of the facts is more impressive than many pages of theory. A prefect of the city, Pedanius Secundus by name, was murdered by one of his slaves and the criminal could not be apprehended. According to law, all the bondmen of the murdered man, four hundred in number, were to be put to death. The populace, to their honor be it said, more humane than the senators, raised a tumult of protest against the execution of the sentence. Their sympathy availed nothing; the unhappy victims were led away to die. One of the senators even proposed a decree that all the freedmen belonging to the household of the late prefect should be transported beyond the confines of Italy. But the emperor, and that emperor was Nero, more humane than the optimates, alleged that the laws were already severe enough, and that it would be cruel to add to their severity by fresh enactments. The decree of expulsion was not passed. Yet Tacitus, from whom this narrative is taken, a writer who never tires of lamenting the degeneracy of his age, has not a word of compassion for the unfortunate sufferers, nor a syllable of condemnation for an atrocious law.