Catognatus also adopted the stratagem of sending emissaries to the houses of the people under the guise of travellers. They professed to have seen Cæsar's troops, and to have found them half-starved and utterly destitute; they affirmed that the best of them had been obliged frequently to retreat before the Helvetii; that they were reduced by three-fourths, and that the remainder of their army was composed of raw recruits and of auxiliaries, who were only waiting for an opportunity to return home. These reports, spread through the valley, were still more efficacious than Catognatus's discourse; for the Gauls have always been inclined to lend a willing ear to representations that flatter their desires, without inquiring whether they are true or false. If any of the older men shook their heads and said that it would be as well to know what was asked of them before assuming a hostile attitude, they were treated with contempt. Catognatus, seeing all the people inclined to resist, had trunks of trees mingled with earth and pebbles heaped up before the weaker points of the Oppidum. They re-dug the ditch before the walls of the left bank and surrounded with palisades the part of the city that had remained unprotected on the right bank. In addition to this, Catognatus had a cutting dug at a hundred paces from the Oppidum between its northern salient and the plateau. These works, hastily undertaken, were still unfinished when the arrival of the Roman troops was announced. The infantry were advancing in good order in the valley on the left bank, while the cavalry followed the hills on the same side. Not a man quitted the ranks to go and pillage the houses, and neither songs nor shouts were heard. The helmets of polished bronze worn by the legionaries were shining in the sun, and, seen from a distance, the troop resembled a long fiery serpent uncoiling in the meadows. From the elevated tower occupied by Catognatus the slightest movements of the Romans were visible. They soon deployed along the rivulet, their left being against the river and their right protected by the cavalry on the hills. The lieutenant, Titurius, then sent an envoy into the city. He was commissioned to announce to the magistrates that the Romans appeared as friends, but that since Catognatus had given an asylum to some of the Helvetii, and had notoriously exercised his power to prevent the Ædui from furnishing the supplies promised to the army commanded by Cæsar, and which had come into Gaul with the sole purpose of hindering the Helvetii from devastating,--that is, strictly in the character of allies,--they must deliver up the said Catognatus and the Helvetian refugees to the lieutenant Titurius without delay: that if this was done the Romans would only demand provisions for ten days,--a reasonable requirement, as between allies; after which they would return to the Ædui.