(3) +The Epistles (Sermones)+ in two Books, and +Ars Poetica+ (_Ep. ad Pisones_).--These represent his most mature production. As a poet Horace now stood without a rival. Life was still full of vivid interest for him, but years (_fallentis semita vitae_) had brought the philosophic mind. ‘To teach the true end and wise regulation of life, and to act on character from within, are the motives of the more formal and elaborate epistles.’ --Sellar. The +Ars Poetica+ is a _résumé_ of Greek criticism on the drama. 3. Style. ‘With the principal lyric metres, the Sapphic and Alcaic, Horace had done what Vergil had accomplished with the dactylic hexameter, carried them to the highest point of which the foreign Latin tongue was capable.’ --Mackail. ‘As Vergil is the most idealising exponent of what was of permanent and universal significance in the time, Horace is the most complete exponent of its actual life and movement. He is at once the lyrical poet, with heart and imagination responsive to the deeper meaning and lighter amusements of life, and the satirist, the moralist, and the literary critic of the age.’ --Sellar. JUSTINUS, circ. 150 A.D. (_temp._ Antoninus Pius). 1. Life. [Sidenote: JUSTINUS.] We know nothing positively about him, though probably he lived in the age of the Antonines. Teuffel says ‘Considering his correct mode of thinking and the style of his preface, we should not like to put him much later than Florus, who epitomised Livy.’ 2. Works. +Epitoma Historiarum Philippicarum Pompei Trogi+, in forty-four Books.--An abridgment of the Universal History of Pompeius Trogus (_temp._ Livy). The title _Historiae Philippicae_ was given to it by Trogus because its main object was to give the history of the Macedonian monarchy, with all its branches, but he allowed himself, like Herodotus, to indulge in such large digressions that it was regarded by many as a Universal History. It was arranged according to nations; it began with Ninus, the Nimrod of legend, and was brought down to about 9 A.D. 3. Style. Justinus (as he tells us in his Preface) made it his business to form an attractive reading-book--_breve veluti florum corpusculum feci_ (an anthology)--and his chief merit is that he seems to have been a faithful abbreviator. DECIMUS JUNIUS JUVENALIS, 55-138 A.D. 1. Life. [Sidenote: JUVENAL.]