If the enemy accept your aid, keep as much as possible in separate quarters, so that it will not be difficult for you to make your grass necklaces, and you will have your lighted fires to use, while you will also avail yourselves of the fire made by the enemy. But if through distrust they separate you into small parties, arrange beforehand your signals of attack, and instead of grass necklaces, have the right leg bare.... Fourteen days!" "I understand." [Illustration: FIG. 6.] Sigild had surrounded the camp with a number of wooden towers placed on the old rampart, which had been strengthened. These towers, whose appearance is shown in Fig. 6, were made of trunks of trees piled one upon another, and framed at their extremities. They projected from the rampart. At their summit was constructed a wooden floor surrounded by a parapet of wattling; and this floor was reached by means of a ladder placed inside the tower. The under story gave shelter to the men charged with the defence of the towers, and who watched from the top. If they perceived any suspicious movement without, it was their duty to give the alarm by blowing a horn. Sigild had fixed the number of men for each tower at twenty. Two of these twenty men remained day and night on the platform, the day and the night being each divided into four parts; there were eight men on duty during the day and eight during the night. Of the four remaining, the first was constituted chief of the tower; the second was intrusted with the stores, and the distribution of food and munitions; the third was to be at the disposal of the chief of the tower, to carry messages and seek for help in case of need; and the business of the fourth was to repair the injuries caused to the defences in the event of an attack. As the circumvallation measured four thousand five hundred paces, and the towers were one hundred paces apart, there were forty-five towers, including the stronger and loftier ones placed on the two sides of the entrances. Nine hundred men sufficed to guard them. Sigild had taken the precaution of having a store of timber and branches brought within the inclosure of the Oppidum. By his care the wells had been deepened, and a trench dug outside the ramparts, towards the north. In addition to the flocks that habitually grazed within the camp, a great number of cattle had been brought by the fugitives to the plateau. But it would not have been possible to feed all these animals if stores of fodder had not been laid in beforehand. Accordingly, great stacks of grass had been placed along beside the rampart, thatched with reeds. Between the towers the guarding of the ramparts was intrusted to a thousand men, put under the order of fifty-three chiefs; the two entrances were under the command of warriors of tried courage, and well known to Sigild.