Res Gestae

Thus, after covering long distances over level country, he had entered Hadrianopolis, a city in the region of Mt. Haemus, formerly called Uscudama, and for twelve days was recovering his strength, exhausted by his exertions. There he learned that certian Theban legions that were passing the winter in near-by towns had sent some of their comrades to encourage him by faithful and sure promises to remain there, since they were full of confidence in their strength and were posted in large numbers in neighbouring encampments; but owing to the watchful care of those about him, he could not steal an opportunity of seeing them or hearing the message that they brought.

Then, as

Yet all this time, whenever nature allowed him sleep, his senses were wounded by frightful spectres that shrieked about him, and throngs of those whom he had slain, led by Domitianus and Montius, would seize him and fling him to the claws of the Furies, as he imagined in his dreams.

For the mind, when freed from the bonds of the body, being always filled with tireless movement, from the underlying thoughts and worries which torment the minds of mortals, conjures up the nocturnal visions to which we[*](I.e. we Greeks.) give the name of phantasies.