The Roman History · Amm. 26.8.9

This boom, however, after great exertions on the part of both soldiers and generals, who were all exhausted by the fierce nature of the struggle, a tribune of the name of Aliso, an experienced and skilful warrior, cut through in the following manner:—He fastened together three vessels, and placed upon them a kind of testudo, thus,—on the benches stood a body of armed men, united together by their shields, which joined above their heads; behind them was another row, who stooped, so as to be lower; a third rank bent lower still, so as to form a regular gradation; so that the last row of all, resting on their haunches, gave the whole formation the appearance of an arch. This kind of machine is employed in contests under the walls of towns, in order that while the blows of missiles and stones fall on the slippery descent they may pass off like so much rain.

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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