The Annals and the Histories · Ann. 13.2

And now they had proceeded to further murders but for the opposition of Afranius Burrus and Annaeus Seneca. These two men guided the emperor's youth with an unity of purpose seldom found where authority is shared, and though their accomplishments were wholly different, they had equal influence. Burrus, with his soldier's discipline and severe manners, Seneca, with lessons of eloquence and a dignified courtesy, strove alike to confine the frailty of the prince's youth, should he loathe virtue, within allowable indulgences. They had both alike to struggle against the domineering spirit of Agrippina, who inflamed with all the passions of an evil ascendency had Pallas on her side, at whose suggestion Claudius had ruined himself by an incestuous marriage and a fatal adoption of a son. Nero's temper however was not one to submit to slaves, and Pallas, by a surly arrogance quite beyond a…

Cornelius Tacitus · trans. Church & Brodribb, 1876
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