The Roman History · Amm. 30.7.8

Amid all these prudent actions he also turned his attention to the Saxons who had lately broken out with extreme ferocity, making attacks in every direction where they were least expected, and had now penetrated into the inland districts, from which they were returning enriched by a vast booty. He destroyed them utterly by a device which was indeed treacherous, but most advantageous; and he recovered by force all the booty which the defeated robbers were carrying off.

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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