The Roman History · Amm. 21.12.9

With great rapidity they built some wooden towers, higher than the battlements of the enemy, and then fastening their boats together, they placed these towers on them. In them they stationed soldiers, who, with undaunted resolution, laboured to drive down the garrison from the walls; while under them were bodies of light infantry wholly unencumbered, who going forth from the hollow parts of the towers below, threw drawbridges across, which they had put together beforehand, and so tried to cross over to the bottom of the wall while the attention of the garrison was diverted from them; so that while those above them were attacking one another with darts and stones, those who crossed over on the drawbridges might be able without interruption to break down a portion of the wall and so effect an entrance.

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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