Together with this remarkable power over new prose rhythms, Tacitus shows in the _Agricola_ the complete mastery of mordant and unforgettable phrase which makes his mature writing so unique. Into three or four ordinary words he can put more concentrated meaning than any other author. The likeness and contrast between these brief phrases of his and the "half-lines" of Virgil might repay a long study. They are alike in their simple language, which somehow or other is charged with the whole personality of the author; but the personality itself is in the sharpest antithesis. The Virgilian phrases, with their grave pity, are steeped in a golden softness that is just touched with a far-off trouble, a pathetic waver in the voice as if tears were not far below it. Those of Tacitus are charged with indignation instead of pity; "like a jewel hung in ghastly night," to use Shakespeare's memorable simile, or like the red and angry autumnal star in the _Iliad_, they quiver and burn. Phrases like the famous _ubi solitudinem faciunt pacem appellant_, or the _felix opportunitate mortis_, are the concentrated utterance of a great but deeply embittered mind. In this spirit Tacitus set himself to narrate the history of the first century of the Empire. Under the settled equable government of Trajan, the reigns of the Julio-Claudian house rapidly became a legendary epoch, a region of prodigies and nightmares and Titanic crimes. Even at the time they happened many of the events of those years had thrown the imagination of their spectators into a fever. The strong taint of insanity in the Claudian blood seemed to have communicated itself to the world ruled over by that extraordinary series of men, about whom there was something inhuman and supernatural. Most of them were publicly deified before their death. The _Fortuna Urbis_ took in them successive and often monstrous incarnations. Augustus himself was supposed to have the gift of divination; his foreknowledge overleapt the extinction of his own house, and foresaw, across a gap of fifty years, the brief reign of Galba. Caligula threw an arch of prodigious span over the Roman Forum, above the roofs of the basilica of Julius Caesar, that from his house on the Palatine he might cross more easily to sup with his brother, Jupiter Capitolinus. Nero's death was for years regarded over half the Empire as incredible; men waited in a frenzy of excited terror for the reappearance of the vanished Antichrist. Even the Flavian house was surrounded by much of the same supernatural atmosphere. The accession of Vespasian was signalised by his performing public miracles in Egypt; Domitian, when he directed that he should be formally addressed as _Our Lord God_ by all who approached him, was merely settling rules for an established practice of court etiquette. In this thunderous unnatural air legends of all sorts sprung up right and left; foremost, and including nearly all the rest,