The Annals and the Histories · Ann. 6.21

Whenever he sought counsel on such matters, he would make use of the top of the house and of the confidence of one freedman, quite illiterate and of great physical strength. The man always walked in front of the person whose science Tiberius had determined to test, through an unfrequented and precipitous path (for the house stood on rocks), and then, if any suspicion had arisen of imposture or of trickery, he hurled the astrologer, as he returned, into the sea beneath, that no one might live to betray the secret. Thrasyllus accordingly was led up the same cliffs, and when he had deeply impressed his questioner by cleverly revealing his imperial destiny and future career, he was asked whether he had also thoroughly ascertained his own horoscope, and the character of that particular year and day. After surveying the positions and relative distances of the stars, he first paused, then…

Cornelius Tacitus · trans. Church & Brodribb, 1876
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