XX.-Divitiacus, embracing Caesar, begins to implore him, with many tears, that "he would not pass any very severe sentence upon his brother; saying, that he knows that those [charges] are true, and that nobody suffered more pain on that account than he himself did; for when he himself could effect a very great deal by his influence at home and in the rest of Gaul, and he [Dumnorix] very little on account of his youth, the latter had become powerful through his means, which power and strength he used not only to the lessening of his [Divitiacus] popularity, but almost to his ruin; that he, however, was influenced both by fraternal affection and by public opinion. But if anything very severe from Caesar should befall him [Dumnorix], no one would think that it had been done without his consent, since he himself held such a place in Caesar's friendship; from which circumstance it would arise that the affections of the whole of Gaul would be estranged from him." As he was with tears begging these things of Caesar in many words, Caesar takes his right hand, and, comforting him, begs him to make an end of entreating, and assures him that his regard for him is so great that he forgives both the injuries of the republic and his private wrongs, at his desire and prayers. He summons Dumnorix to him; he brings in his brother; he points out what he censures in him; he lays before him what he of himself perceives, and what the state complains of; he warns him for the future to avoid all grounds of suspicion; he says that he pardons the past, for the sake of his brother, Divitiacus. He sets spies over Dumnorix that he may be able to know what he does, and with whom he communicates. XXI.--Being on the same day informed by his scouts that the enemy had encamped at the foot of a mountain eight miles from his own camp, he sent persons to ascertain what the nature of the mountain was, and of what kind the ascent on every side. Word was brought back that it was easy. During the third watch he orders Titus Labienus, his lieutenant with praetorian powers, to ascend to the highest ridge of the mountain with two legions, and with those as guides who had examined the road; he explains what his plan is. He himself during the fourth watch, hastens to them by the same route by which the enemy had gone, and sends on all the cavalry before him. Publius Considius, who was reputed to be very experienced in military affairs, and had been in the army of Lucius Sulla, and afterwards in that of Marcus Crassus, is sent forward with the scouts.