This regulation, however, was of little avail, as the emperors frequently admitted freedmen into the equestrian order. When private persons were no longer appointed judices, the necessity for a distinct class in the community, like the equestrian order, ceased entirely; and the gold ring came at length to be worn by all free citizens. Even slaves, after their manumission, were allowed to wear it by special permission from the emperor, which appears to have been usually granted provided the patronus consented.--Having thus traced the history of the equestrian order to its final extinction as a distinct class in the community, we must now return to the equites equo publico, who formed the 18 equestrian centuries. This class still existed during the latter years of the republic, but had entirely ceased to serve as horse-soldiers in the army. The cavalry of the Roman legions no longer consisted, as in the time of Polybius, of Roman equites, but their place was supplied by the cavalry of the allied states. It is evident that Caesar in his Gallic wars possessed no Roman cavalry. When he went to an interview with Ariovistus, and was obliged to take cavalry with him, we are told that he did not dare to trust his safety to the Gallic cavalry, and therefore mounted his legionary soldiers upon their horses. The Roman equites are, however, frequently mentioned in the Gallic and civil wars, but never as common soldiers; they were officers attached to the staff of the general, or commanded the cavalry of the allies, or sometimes the legions.--After the year B.C. 50, there were no censors in the state, and it would therefore follow that for some years no review of the body took place, and that the vacancies were not filled up. When Augustus, however, took upon himself, in B.C. 29, the praefectura morum, he frequently reviewed the troops of equites, and restored the long neglected custom of the solemn procession (_transvectio_). From this time these equites formed an honourable corps, from which all the higher officers in the army and the chief magistrates in the state were chosen. Admission into this body was equivalent to an introduction into public life, and was therefore esteemed a great privilege. If a young man was not admitted into this body, he was excluded from all civil offices of any importance, except in municipal towns; and also from all rank in the army, with the exception of centurion. All those equites, who were not employed in actual service, were obliged to reside at Rome, where they were allowed to fill the lower magistracies, which entitled a person to admission into the senate. They were divided into six turmae, each of which was commanded by an officer, who is frequently mentioned in inscriptions as _Sevir equitum Rom. turmae_ I. II., &c., or commonly _Sevir turmae_ or _Sevir turmarum equitum Romanorum_. From the time that the equites bestowed the title of _principes juventutis_ upon Caius and Lucius Caesar, the grandsons of Augustus,