The Roman History · Amm. 21.12.8

On the other hand, the besiegers, though fearing another combat, and full of anxiety, still out of shame would not appear lazy or cowardly, and as they could make no way by open attacks, they also applied themselves to the various manœuvres employed in sieges. And because there was no ground favourable for working battering-rams or other engines, nor for making mines, since the river Natiso passed under the walls of the city, they contrived a plan worthy to be compared with any effort of ancient skill.

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
Passage preview. Read in context for the complete text, notes and references.