At break of day Labienus occupied the heights, and Cæsar was no more than 1,500 paces from the camp of the barbarians; the latter suspected neither his approach nor that of his lieutenant. Suddenly Considius arrived at full gallop to announce that the mountain of which Labienus was to take possession was in the power of the Helvetii; he had recognised them, he said, by their arms and their military ensigns. At this news, Cæsar, fearing that he was not in sufficient force against their whole army, with only four legions, chose a strong position on a neighbouring hill, and drew up his men in order of battle. Labienus, whose orders were not to engage in battle till he saw the troops of Cæsar near the enemy’s camp, remained immovable, watching for him. It was broad daylight when Cæsar learnt that his troops had made themselves masters of the mountain, and that the Helvetii had left their camp. They escaped him thus, through the false report of Considius, who had been blinded by a groundless terror. Admitting that the Helvetii had passed near Issy-l’Evêque, Mount Tauffrin, which rises at a distance of four kilomètres to the west of that village, answers to the conditions of the text. There is nothing to contradict the notion that Labienus and Cæsar may have, one occupied the summit, the other approached the enemy’s camp within 1,500 paces, without being perceived; and the neighbouring ground presents heights which permitted the Roman army to form in order of battle.[181] [Sidenote: Defeat of the Helvetii near Bibracte.] VI. That day the Helvetii continued their advance to Remilly, on the Alène. Since the passage of the Saône, they had marched about a fortnight, making an average of not more than eleven or twelve kilomètres a day.[182] According to our reckoning, it must have been the end of the month of June. Cæsar followed the Helvetii at the usual distance, and established his camp at three miles’ distance from theirs, on the Cressonne, near Ternant. Next day, as the Roman army had provisions left for no more than two days,[183] and as, moreover, Bibracte (_Mont Beuvray_),[184] the greatest and richest town of the Ædui, was not more than eighteen miles (twenty-seven kilomètres) distant, Cæsar, to provision his army, turned from the road which the Helvetii were following, and took that to Bibracte. (_See Plate 4._) The enemy was informed of this circumstance by some deserters from the troop of L. Emilius, decurion[185] of the auxiliary cavalry. Believing that the Romans were going from them through fear, and hoping to cut them off from their provisions, they turned back, and began to harass the rear-guard.