This taste was not without its inconveniences and dangers. Men of rank and political importance kept _families_, as they were called, of gladiators--desperadoes ready to execute any command of their master; and towards the fall of the republic, when party rage scrupled not to have recourse to open violence, questions of the highest import were debated in the streets of the city by the most despised of its slaves. In the conspiracy of Catiline so much danger was apprehended from them, that particular measures were taken to prevent their joining the disaffected party; an event the more to be feared because of the desperate war in which they had engaged the republic a few years before, under the command of the celebrated Spartacus. At a much later period, at the triumph of Probus, A.D. 281, about fourscore gladiators exhibited a similar courage. Disdaining to shed their blood for the amusement of a cruel people, they killed their keepers, broke out from the place of their confinement, and filled the streets of Rome with blood and confusion. After an obstinate resistance they were cut to pieces by the regular troops. The oath which they took upon entering the service is preserved by Petronius, and is couched in these terms: "We swear, after the dictation of Eumolpus, to suffer death by fire, bonds, stripes, and the sword; and whatever else Eumolpus may command, as true gladiators we bind ourselves body and mind to our master's service." From slaves and freedmen the inhuman sport at length spread to persons of rank and fortune, insomuch that Augustus was obliged to issue an edict, that none of senatorial rank should become gladiators; and soon after he laid a similar restraint on the knights.