The Annals and the Histories · Ann. 1.6

The first crime of the new reign was the murder of Postumus Agrippa. Though he was surprised and unarmed, a centurion of the firmest resolution despatched him with difficulty. Tiberius gave no explanation of the matter to the Senate; he pretended that there were directions from his father ordering the tribune in charge of the prisoner not to delay the slaughter of Agrippa, whenever he should himself have breathed his last. Beyond a doubt, Augustus had often complained of the young man's character, and had thus succeeded in obtaining the sanction of a decree of the Senate for his banishment. But he never was hard-hearted enough to destroy any of his kinsfolk, nor was it credible that death was to be the sentence of the grandson in order that the stepson might feel secure. It was more probable that Tiberius and Livia, the one from fear, the other from a stepmother's enmity, hurried on the…

Cornelius Tacitus · trans. Church & Brodribb, 1876
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