IV. Next morning, he divided the infantry and cavalry into three bodies, and sent them separately in pursuit of the enemy. The troops had advanced a considerable distance, and already the hindmost of the fugitives were in view, when a party of cavalry, despatched by Q. Atrius, came to announce that, in the preceding night, a violent tempest had damaged and thrown on shore nearly all the vessels. Neither anchors nor cordage had been strong enough to resist; the efforts of pilots and sailors had been powerless, and the shocks of the vessels against one another had caused serious loss. At this news, Cæsar called in his troops, ordered them to limit their efforts to repulsing the enemy as they retired, and hurried on before them to his fleet. He verified the correctness of the losses which were announced: about forty ships were destroyed, and the repair of the others required a long labour. He took the workmen attached to the legions, and brought others from the continent; wrote to Labienus to build, with his troops, the greatest number of ships possible; and lastly, in order to place his fleet in safety from all danger, he resolved, in spite of the labour it must entail upon him, to haul all the vessels on land, and inclose them in the camp by a new retrenchment.[400] The soldiers employed ten entire days in this work, without interruption, even during the night.[401] [Sidenote: Cæsar resumes the offensive.] V. The vessels once placed on dry ground and surrounded with substantial defences, Cæsar left in the camp the same troops as before, and returned towards the localities where he had been obliged to abandon the pursuit of the Britons. He found them collected in great number. The general direction of the war had been entrusted to Cassivellaunus, whose states were separated from the maritime districts by the Thames, a river which was about eighty miles distant from the coast.[402] This chief had heretofore had to sustain continual wars against the other peoples of the island; but, in face of the danger, all, with unanimous accord, agreed in giving him the command. The enemy’s cavalry, with the war-chariots, attacked vigorously the cavalry in its march; they were everywhere beaten and driven back into the woods or to the heights. A short time after, while the Romans were labouring without distrust at their retrenchments, the Britons suddenly issued from the woods and attacked their advanced posts. The struggle becoming obstinate, Cæsar sent forward two picked cohorts, the first of two legions. They had hardly taken their position, leaving a slight interval between them, when the barbarians, manœuvring with their chariots according to custom, so intimidated the Romans by this mode of fighting, that they passed and repassed with impunity across the interval between the cohorts. The enemy was only repulsed on the arrival of re-enforcements. Q. Laberius Durus, a military tribune, perished in this action.