The literature of Trajan's reign was second only to that of the Augustan age. His time has often been called the SILVER AGE. Its prose writers were, however, unlike those of the Augustan age, far superior to its poets. The most famous prose writers were TACITUS, PLINY THE YOUNGER, and QUINTILIAN.

The poets of this period were JUVENAL, PERSIUS, MARTIAL, LUCAN, and STATIUS, of whom the last two were of an inferior order.

HADRIAN (117-138).

Trajan was succeeded by his cousin's son, HADRIAN, a native of Spain. One of the first acts of Hadrian was to relinquish the recent conquests of Trajan, and to restore the old boundaries of the Empire. The reasons for this were that they had reached the utmost limits which could lend strength to the power of Rome, or be held in subjection without constant and expensive military operations. The people occupying the new conquests were hardy and warlike, scattered over a country easy of defence, and certain to strive constantly against a foreign yoke.

Hadrian displayed constant activity in travelling over the Empire, to overlook personally its administration and protection. He visited Britain, where he crushed the inroads of the Caledonians and built a fortified line of works, known as the PICTS' WALL, extending from sea to sea. The remains of this great work are still to be seen, corresponding nearly to the modern boundary between England and Scotland. He also visited the East, where the Jews were making serious trouble, and completed their overthrow.

On his return to the city, the Emperor devoted himself to its adornment. Several of his works, more or less complete, still remain. The most famous of these is the MAUSOLÉUM (Tomb) OF HADRIAN, now known as the Castle of San Angelo.

Hadrian was afflicted with bad health, suffering much from diseases from which he could find no relief. On account of this, and to secure a proper succession, he associated with himself in the government TITUS AURELIUS ANTONÍNUS, and required him to adopt Marcus Annius Verus and Lucius Verus. In 138, soon after this arrangement was made, Hadrian died, leaving the Empire to Titus.

TITUS AURELIUS ANTONÍNUS PIUS (138-161).

ANTONÍNUS, a native of Gaul, was fifty-two years old when he succeeded to the throne. The cognomen PIUS was conferred upon him by the Senate on account of the affectionate respect which he had shown for Hadrian. He was a man of noble appearance, firm and prudent, and under him the affairs of state moved smoothly.

MARCUS AURELIUS ANTONÍNUS (161-180).