C. Julius Caesar, Gallic War

After learning these circumstances, since to these suspicions the most unequivocal facts were added, viz., that he had led the Helvetii through the territories of the Sequani; that he had provided that hostages should be mutually given; that he had done all these things, not only without any orders of his [Caesar's] and of his own state's, but even without their [the Aedui] knowing any thing of it themselves; that he [Dumnorix] was reprimanded: by the [chief] magistrate of the Aedui; he [Caesar] considered that there was sufficient reason, why he should either punish him himself, or order the state to do so. One thing [however] stood in the way of all this-that he had learned by experience his brother Divitiacus's very high regard for the Roman people, his great affection toward him, his distinguished faithfulness, justice, and moderation; for he was afraid lest by the punishment of this man, he should hurt the feelings of Divitiacus. Therefore, before he attempted any thing, he orders Divitiacus to be summoned to him, and, when the ordinary interpreters had been withdrawn, converses with him through Caius Valerius Procillus, chief of the province of Gaul, an intimate friend of his, in whom he reposed the highest confidence in every thing; at the same time he reminds him of what was said about Dumnorix in the council of the Gauls, when he himself was present, and shows what each had said of him privately in his [Caesar's] own presence; he begs and exhorts him, that, without offense to his feelings, he may either himself pass judgment on him [Dumnorix] after trying the case, or else order the [Aeduan] state to do so.