Tacitus was educated for the bar, and continued to plead causes, occasionally at least, and with not a little success, even after he had entered upon the great business of his life, as a writer of history. We find references to his first, and perhaps his last appearance, as an advocate, in the Letters of Pliny, which are highly complimentary. The first was, when Pliny was nineteen, and Tacitus a little older (how much we are not informed), when Tacitus distinguished himself, so as to awaken the emulation and the envy, though not in a bad sense, of Pliny. The last was some twenty years later, when Tacitus and Pliny, the tried friends of a whole life, the brightest ornaments of literature and of the forum, were associated by the choice of the Senate, and pleaded together at the bar of the Senate, and in the presence of the Emperor Trajan, for the execution of justice upon Marius Priscus, who was accused of maladministration in the proconsulship of Africa. Pliny says, that Tacitus spoke with singular gravity and eloquence, and the Senate passed a unanimous vote of approbation and thanks to both the orators, for the ability and success with which they had managed the prosecution (Plin. Epis. ii. 11)
We have also the comments of Pliny on a panegyrical oration, which Tacitus pronounced, when consul, upon his predecessor in the consular office, Verginius Rufus, perhaps the most remarkable man of his age, distinguished alike as a hero, a statesman, and a scholar, and yet so modest or so wise that he repeatedly refused the offer of the imperial purple. "Fortune," says Pliny, "always faithful to Verginius, reserved for her last favor, such an orator to pronounce a eulogium on such virtues. It was enough to crown the glory of a well spent life" (Plin. Epis. ii. 1).
The speeches in the historical works of Tacitus, though rather concise and abstract for popular orations, are full of force and fire. Some of them are truly Demosthenic in their impassioned and fiery logic. The speech of Galgacus before the Briton army, when driven into the extremity of Caledonia by the Romans under Agricola, can hardly be surpassed for patriotic sentiments, vigorous reasoning, and burning invective. The address of Germanicus to his mutinous soldiers (in the Annals) is not less remarkable for tender pathos. The sage and yet soldierlike address of the aged Galba to his adopted son Piso, the calm and manly speech of Piso to the body guard, the artful harangue of the demagogue Otho to his troops, the no less crafty address of Mucianus to Vespasian, the headlong rapidity of Antonius' argument for immediate action, the plausible plea of Marcellus Eprius against the honest attack of Helvidius Priscus, and the burning rebukes of the intrepid Vocula to his cowardly and treacherous followers--all these, in the Histories, show no ordinary degree of rhetorical skill and versatility. Indeed, the entire body of his works is animated with the spirit of the orator, as it is tinged also with the coloring of the poet. For this reason, they are doubtless deficient in the noble simplicity of the earlier classical histories; but for the same reason they may be a richer treasure for the professional men at least of modern times.