Afflictabant tamen multo vehementius Persas ictus varii ballistarum, tamquam per transennam a clivis structilibus decurrentes. Unde fortunas suas sitas in extremo iam cogitantes, destinatam ruebant in mortem, et partiti munera dimicandi inter necessitatis articulos, relictis qui moenia tuerentur, reserata latenter postica, strictis gladiis valida manus erupit, pone sequentibus aliis, qui flammas occulte portabant. Dumque Romani nunc instant cedentibus, nunc ultro incessentes excipiunt, qui vehebant foculos repentes incurvi, prunas unius aggesti inseruere iuncturis ramis arborum diversarum, et iunco et manipulis constructi cannarum: qui conceptis incendiorum aridis nutrimentis, iam cremabantur, militibus cum intactis tormentis exinde periculose digressis.
Translation :
The Persians, however, were more sorely troubled by the various missiles sent from the ballistae, which as if along a tight rope rushed down the artificial slopes of the earthworks. Therefore, thinking that their fortunes were now at their lowest ebb, they rushed to meet certain death, and distributing the duties of their soldiers in the midst of their desperate crisis, they left some behind to hold the walls, while a strong force secretly opened a postern gate and rushed out, drawn sword in hand, followed by others who carried concealed fires. And while the Romans now pressed hard on those who gave way, and now met those who ventured to charge, the men who carried the fire-pans, stooping low and creeping along, pushed live coals into the joints of one of the mounds, which was built of the boughs of various kinds of trees, of rushes, and of bundles of cane. These, as soon as the dry fuel caught fire, at once burst into flame, and our soldiers only with extreme peril got away with their engines uninjured.
Edition :
Ammianus Marcellinus. With An English Translation. John C. Rolfe, Ph.D., Litt.D. Cambridge. Cambridge, Mass., Harvard University Press; London, William Heinemann, Ltd. 1935-1940.
Remark :
source: The quote extends into 20.11.23. long-term consequence: The Romans did not attempt to take the fortress by storm again after this, only attempting some skirmishing and to starve the defenders, partially due to bad weather. (20.11.24-25)