C. Julius Caesar, Gallic War

Having been apprised of the arrival of Crassus by the scouts at about the third hour, he advances twenty miles that day. He appoints Crassus over Samarobriva and assigns him a legion, because he was leaving there the baggage of the army, the hostages of the states, the public documents, and all the corn, which he had conveyed thither for passing the winter. Fabius, without delaying a moment, meets him on the march with his legion, as he had been commanded. Labienus, having learned the death of Sabinus and the destruction of the cohorts, as all the forces of the Treviri had come against him, beginning to fear lest, if he made a departure from his winter-quarters, resembling a flight, he should not be able to support the attack of the enemy, particularly since he knew them to be elated by their recent victory, sends back a letter to Caesar, informing him with what great hazard he would lead out his legion from winter-quarters; he relates at large the affairs which had taken place among the Eburones; he informs him that all the infantry and cavalry of the Treviri had encamped at a distance of only three miles from his own camp.