The Roman History · Amm. 14.1.9

At last, by an unsurpassed and most pernicious baseness, Gallus ventured on adopting a course of fearful wickedness, which indeed Gallienus, to his own exceeding infamy, is said formerly to have tried at Rome; and, taking with him a few followers secretly armed, he used to rove in the evening through the streets and among the shops, making inquiries in the Greek language, in which he was well skilled, what were the feelings of individuals towards Cæsar. And he used to do this boldly in the city, where the brillancy of the lamps at night often equalled the light of day. At last, being often recognized, and considering that if he went out in this way he should be known, he took care never to go out except openly in broad daylight, to transact whatever business which he thought of serious importance. And these things caused bitter though secret lamentation, and discontent to many.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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