C. Julius Caesar, Gallic War

Having, therefore, called a council of war a little before evening, he exhorted his soldiers to execute with diligence and energy such commands as he should give; he assigns the ships which he had brought from Melodunum to Roman knights, one to each, and orders them to fall down the river silently for four miles, at the end of the fourth watch, and there wait for him. He leaves the five cohorts, which he considered to be the most steady in action, to guard the camp; he orders the five remaining cohorts of the same legion to proceed a little after midnight up the river with all their baggage, in a great tumult. He collects also some small boats; and sends them in the same direction, with orders to make a loud noise in rowing. He himself, a little after, marched out in silence, and, at the head of three legions, seeks that place to which he had ordered the ships to be brought.