The forms of serious poetry, prevailing during this period, were the tragic drama, the annalistic epic, and satire. Tragedy was earliest introduced, was received with most favour, and was cultivated by all the poets of the period, with the exception of Lucilius and the comic writers. The epic poetry of the age was the work of Naevius and Ennius. It has greater claims to originality and national spirit, both in form and substance, and it exercised a more powerful influence on the later poetry of Rome, than either the tragedy or comedy of the time. The invention of satire, the most purely original of the three, is generally attributed to Lucilius; but the satiric spirit was shown earlier in some of the dramas of Naevius; and the first modification of the primitive satura to a literary shape was the work of Ennius, who was followed in the same style by his nephew Pacuvius. No complete work of any of these poets has been preserved to modern times. Our knowledge of the epic, tragic, and satiric poetry of this long period is derived partly from ancient testimony, but chiefly from the examination of numerous fragments. Most of these have been preserved, not by critics on account of their beauty and worth, but by grammarians on account of the obsolete words and forms of speech contained in them,--a fact, which probably leads us to attribute to the earlier literature a more abnormal and ruder style than that which really belonged to it. A few of the longest and most interesting fragments have come down in the works of the admirers of those ancient poets, especially of Cicero and Aulus Gellius. The notion that can be formed of the early Roman literature must thus, of necessity, be incomplete. Yet these fragments are sufficient to produce a consistent impression of certain prevailing characteristics of thought and sentiment. Many of them are valuable from their own intrinsic worth; others again from the grave associations connected with their antiquity, and from the authentic evidence they afford of the moral and intellectual qualities, the prevailing ideas and sympathies of the strongest race of the ancient world, about, or shortly after, the time when they attained the acme of their moral and political greatness.