Julius Caesar Gallic War 8.23

The night following the embassadors bring back his answer to their countrymen and prepare the hostages. Embassadors flock in from the other states, which were waiting for the issue of the [war with the] Bellovaci: they give hostages, and receive his orders; all except Comius, whose fears restrained him from intrusting his safety to any person's honor. For the year before, while Caesar was holding the assizes in Hither Gaul, Titus Labienus, having discovered that Comius was tampering with the state, and raising a conspiracy against Caesar, thought he might punish his infidelity without perfidy; but judging that he would not come to his camp at his invitation, and unwilling to put him on his guard by the attempt, he sent Caius Volusenus Quadratus, with orders to have him put to death under pretense of conference. To effect his purpose, he sent with him some chosen centurions. When they came to the conference, and Volusenus, as had been agreed on, had taken hold of Comius by the hand, and one of the centurions, as if surprised at so uncommon an incident, attempted to kill him, he was prevented by the friends of Comius, but wounded him severely in the head by the first blow. Swords were drawn on both sides, not so much with a design to fight as to effect an escape, our men believing that Comius had received a mortal stroke; and the Gauls, from the treachery which they had seen, dreading that a deeper design lay concealed. Upon this transaction, it was said that Comius made a resolution never to come within sight of any Roman.