His first work is on the "Jugurthine War;" the next related to the period from the consulship of Lepidus to the praetorship of Cicero, and is unfortunately lost. This was followed by a history of the conspiracy of Catiline, "The War of Catiline," in which he paints in vivid colors the depravity of that order of society which, bankrupt in fortune and honor, still plumes itself on its rank and exclusiveness. To Sallust must be conceded the praise of having first conceived the notion of a history, in the true sense of the term. He was the first Roman historian, and the guide of future historians. He had always an object to which he wished all his facts to converge, and he brought them forward as illustrations and developments of principles. He analyzed and exposed the motives of parties, and laid bare the inner life of those great actors on the public stage, in the interesting historical scenes which he describes. His style, although ostentatiously elaborate and artificial, is, upon the whole, pleasing, and almost always transparently clear. Following Thucydides, whom he evidently took as his model, he strives to imitate his brevity; but while this quality with the Greek historian is natural and involuntary, with the Roman it is intentional and studied. The brevity of Thucydides is the result of condensation, that of Salust is elliptical expression. Livy (59-18 B.C.) was born in Padua, and came to Rome during the reign of Augustus, where he resided in the enjoyment of the imperial favor and patronage. He was a warm and open admirer of the ancient institutions of the country, and esteemed Pompey as one of its greatest heroes; but Augustus did not allow political opinions to interfere with the regard which he entertained for the historian. His great work is a history of Rome, which he modestly terms "Annals," in one hundred and forty-two books, of which thirty-five are extant. Besides his history, Livy is said to have written treatises and dialogues, which were partly philosophical and partly historical.