The third pair fought in chariots, being dressed in British costume. Scylax was from the Julian school. Such establishments let out gladiators to those who gave exhibitions, and obtained in this way a considerable income. But Publius Ostorius, as his name implies, was a freeman; presumably he was a gladiator, who, having served a full term, had secured his freedom, and was now fighting on his own account. Though beaten, he was permitted to live, perhaps on account of his creditable record; he had engaged in fifty-one combats. The combatants from the schools of Caesar and Nero were especially popular, and were generally victorious; but gladiators belonging to other proprietors are mentioned, as in the inscriptions of a house on Nola Street, which will be mentioned again presently. Here we find gladiators who were evidently freemen named with others who were slaves of different masters. In only one of these inscriptions, however, do we find the name of an owner that is known to us: _Essed[arius] Auriolus Sisen[nae]_. The chariot fighter Auriolus belonged to a Sisenna, seemingly either the Sisenna Statilius Taurus, who was consul in 16 A.D., or his son of the same name. As we have seen, it was a Statilius Taurus who built the first permanent amphitheatre in Rome, in 29 B.C. The control of this building remained in the hands of the family. In the columbarium in which the ashes of their slaves and freedmen were placed, we find inscriptions of a 'guard of the amphitheatre,' and of a 'doorkeeper'--_custos de amphitheatro_, _ostiarius ab amphitheatro_. It is highly probable that the family--the first in Rome after the imperial house--possessed a training school, and derived an income from furnishing gladiators to those who gave exhibitions. In view of these facts, we must suppose that the 'troop' (_familia gladiatoria_) of Suettius Certus, for example, was simply a band of gladiators brought together for a particular engagement, not a permanent organization. The giver of an exhibition would make a contract for the gladiators that he might need. At the close of the combats the dead would be counted, the surviving freemen paid off and dismissed, and the surviving slaves returned to their masters, 'the troop' thus going out of existence. Occasionally the individual who provided the combats would erect a monument to the fallen, by way of perpetuating the memory of his munificence. A familiar example is the memorial set up by Gaius Salvius Capito at Venosa, of which the inscription is extant. The names are given of the gladiators who were killed, together with the number of their previous combats and victories. They were slaves of different masters, only one of them, Optatus, being owned by Capito himself. Optatus was a tiro, who fell thus in his first contest. Possibly his master had obliged him, on account of some misdemeanor, to enter the arena with little previous training.