LXXII.--Caesar had conceived hopes of ending the affair without an engagement, or without striking a blow, because he had cut off the enemy's supplies. Why should he hazard the loss of any of his men, even in a successful battle? Why should he expose soldiers to be wounded; who had deserved so well of him? Why, in short, should he tempt fortune? especially when it was as much a general's duty to conquer by tactics, as by the sword. Besides, he was moved with compassion for those citizens, who, he foresaw, must fall: and he had rather gain his object without any loss or injury to them. This resolution of Caesar was not generally approved of; but the soldiers openly declared to each other, that since such an opportunity of victory was let pass, they would not come to an engagement, even when Caesar should wish it. He persevered however in his resolution, and retired a little from that place to abate the enemy's fears. Petreius and Afranius, having got this opportunity, retired to their camp. Caesar, having disposed parties on the mountains, and cut off all access to the Ebro, fortified his camp as close to the enemy as he could. LXXIII.--The day following, the generals of his opponents, being alarmed that they had lost all prospect of supplies, and of access to the Ebro, consulted as to what other course they should take. There were two roads, one to Ilerda, if they chose to return, the other to Tarraco, if they should march to it. Whilst they were deliberating on these matters, intelligence was brought them that their watering parties were attacked by our horse: upon which information, they dispose several parties of horse and auxiliary foot along the road, and intermix some legionary cohorts, and begin to throw up a rampart from the camp to the water, that they might be able to procure water within their lines, both without fear, and without a guard. Petreius and Afranius divided this task between themselves, and went in person to some distance from their camp for the purpose of seeing it accomplished.