Two days after, Ariovistus sends ambassadors to Cæsar to state that "he wished to treat with him about those things which had been begun to be treated of between them, but had not been concluded"; and to beg that "he would either again appoint a day for a conference, or if he were not willing to do that, that he would send one of his officers as an ambassador to him." There did not appear to Cæsar any good reason for holding a conference; and the more so as the day before, the Germans could not be restrained from casting weapons at our men. He thought he should not without great danger send to him as ambassador one of his Roman officers, and should expose him to savage men. It seemed therefore most proper to send to him C. Valerius Procillus, the son of C. Valerius Caburus, a young man of the highest courage and accomplishments (whose father had been presented with the freedom of the city by C. Valerius Flaccus), both on account of his fidelity and on account of his knowledge of the Gallic language,--which Ariovistus, by long practice, now spoke fluently,--and because in his case the Germans would have no motive for committing violence;[118] and for his colleague, M. Mettius, who had shared the hospitality of Ariovistus. He commissioned them to learn what Ariovistus had to say, and to report to him. But when Ariovistus saw them before him in his camp, he cried out in the presence of his army, "Why were they come to him? was it for the purpose of acting as spies?" He stopped them when attempting to speak, and cast them into chains. The same day he moved his camp forward and pitched under a hill six miles from Cæsar's camp. The day following he led his forces past Cæsar's camp, and encamped two miles beyond him; with this design--that he might cut off Cæsar from the corn and provisions which might be conveyed to him from the Sequani and the Ædui. For five successive days from that day Cæsar drew out his forces before the camp and put them in battle order, that if Ariovistus should be willing to engage in battle, an opportunity might not be wanting to him. Ariovistus all this time kept his army in camp, but engaged daily in cavalry skirmishes. The method of battle in which the Germans had practiced themselves was this: There were six thousand horse, and as many very active and courageous foot, one of whom each of the horse selected out of the whole army for his own protection. By these men they were constantly accompanied in their engagements; to these the horse retired; these on any emergency rushed forward; if any one, upon receiving a very severe wound, had fallen from his horse, they stood around him; if it was necessary to advance farther than usual or to retreat more rapidly, so great, from practice, was their swiftness, that supported by the manes of the horses they could keep pace with their speed.