The Roman History · Amm. 31.15.9

The traitors did as they were commanded; and when they came near the ditch they stretched out their hands, and with entreaties requested to be admitted into the city as Romans. When they were admitted, however (since no suspicion existed to hinder their admission), and were questioned as to the plans of the enemy, they varied in their tale: and in consequence they were put to the torture, and having formally confessed what they had undertaken to do, they were all beheaded.

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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