service of the imperial authority; on which account, we find Mecaenas
tampering with Propertius, and we may presume, likewise with every other
rising genius in poetry, to undertake an heroic poem, of which Augustus
should be the hero. As the application to Propertius cannot have taken
place until after Augustus had been amply celebrated by the superior
abilities of Virgil and Horace, there seems to be some reason for
ascribing Mecaenas's request to a political motive. Caius and Lucius,
the emperor's grandsons by his daughter Julia, were still living, and
both young. As one of them, doubtless, was intended to succeed to the
government of the empire, prudence justified the adoption of every
expedient that might tend to secure a quiet succession to the heir, upon
the demise of Augustus. As a subsidiary resource, therefore, the
expedient above mentioned was judged highly plausible; and the Roman
cabinet indulged the idea of endeavouring to confirm imperial authority
by the support of poetical renown. Lampoons against the government were
not uncommon even in the time of Augustus; and elegant panegyric on the
emperor served to counteract their influence upon the minds of the
people. The idea was, perhaps, novel in the time of Augustus; but the
history of later ages affords examples of its having been adopted, under
different forms of government, with success.

The Roman empire, in the time of Augustus, had attained to a prodigious
magnitude; and, in his testament, he recommended to his successors never
to exceed the limits which he had prescribed to its extent. On the East
it stretched to the Euphrates; on the South to the cataracts of the Nile,
the deserts of Africa, and Mount Atlas; on the West to the Atlantic
Ocean; and on the North to the Danube and the Rhine; including the best
part of the then known world. The Romans, therefore, were not improperly
called rerum domini [266], and Rome, pulcherrima rerum [267], maxima
rerum [268]. Even the historians, Livy and Tacitus, (156) actuated