Page:Roman History of Ammianus Marcellinus.djvu/370

 since, as we have said, the open plains were regarded with apprehension. And then he undertook the siege of the town, thinking it too dangerous to march forward while leaving formidable enemies in his rear.

7. While he was making great exertions to complete his preparations, the Surena, the enemy's general, fell upon the cattle which were feeding in the palm groves, but was repulsed by those of our squadrons who were appointed to that service, and, having lost a few men, he retired.

8. And the inhabitants of two cities which are made islands by the rivers which surround them, fearing to trust in their means of defence, fled for refuge to Ctesiphon, some fleeing through the thick woods, others crossing the neighbouring marshes on canoes formed out of hollowed trees, and thus made a long journey to the principal or indeed the only shelter which existed for them, intending to proceed to still more distant regions.

9. Some of them were overtaken, and on their resistance were put to death by our soldiers, who, traversing various districts in barks and small boats, brought in from time to time many prisoners. For it had been cleverly arranged that, while the infantry was besieging the town, the squadrons of cavalry should scour the country in small bands in order to bring in booty. And by this system, without doing any injury to the inhabitants of the provinces, the soldiers fed on the bowels of the enemy.

10. And by this time the emperor was besieging with all his might and with a triple line of heavily armed soldiers this town which was fortified with a double wall; and he had great hope of succeeding in his enterprise. But if the attempt was indispensable, the execution was very difficult. For the approach to the town lay everywhere over rocks of great height and abruptness; across which there was no straight road; and dangers of two kinds seemed to render the place inaccessible. In the first place there were towers formidable both for their height and for the number of their garrison; equalling in height the natural mountain on which the citadel was built; and secondly, a sloping plain reached down to the river, which again was protected by stout ramparts.

11. There was a third difficulty not less formidable that the