The few fragments of his _Odyssey_ which survive do not show any high level of attainment; and it is interesting to note that this first attempt to create a mould for Latin poetry went on wrong, or, perhaps it would be truer to say, on premature lines. From this time henceforth the whole serious production of Latin poetry for centuries was a continuous effort to master and adapt Greek structure and versification; the _Odyssey_ of Livius was the first and, with one notable exception, almost the last sustained attempt to use the native forms of Italian rhythm towards any large achievement; this current thereafter sets underground, and only emerges again at the end of the classical period. It is a curious and significant fact that the attempt such as it was, was made not by a native, but by a naturalised foreigner. The heroic hexameter was, of course, a metre much harder to reproduce in Latin than the trochaic and iambic metres of the Greek drama, the former of which especially accommodated itself without difficulty to Italian speech. In his dramatic pieces, which included both tragedies and comedies, Andronicus seems to have kept to the Greek measures, and in this his example was followed by his successors. Throughout the next two generations the production of dramatic literature was steady and continuous. Gnaeus Naevius, the first native Latin poet of consequence, beginning to produce plays a few years later than Andronicus, continued to write busily till after the end of the second Punic War, and left the Latin drama thoroughly established. Only inconsiderable fragments of his writings survive; but it is certain that he was a figure of really great distinction. Though not a man of birth himself, he had the skill and courage to match himself against the great house of the Metelli. The Metelli, it is true, won the battle; Naevius was imprisoned, and finally died in exile; but he had established literature as a real force in Rome. Aulus Gellius has preserved the haughty verses which he wrote to be engraved on his own tomb-- _Immortelles mortales si foret fas flere Flerent divae Camenae Naevium poetam; Itaque postquam est Orci traditus thesauro Obliti sunt Romai loquier lingua Latina._