C. Julius Caesar, Gallic War

And on the first arrival of our army they made frequent sallies from the town, and contended with our men in trifling skirmishes; afterward, when hemmed in by a rampart of twelve feet [in height], and fifteen miles in circuit, they kept themselves within the town. When, vineae having been brought up and a mound raised, they observed that a tower also was being built at a distance, they at first began to mock the Romans from their wall, and to taunt them with the following speeches. "For what purpose was so vast a machine constructed at so great a distance? With what hands," or "with what strength did they, especially [as they were] men of such very small stature" (for our shortness of stature, in comparison to the great size of their bodies, is generally a subject of much contempt to the men of Gaul) "trust to place against their walls a tower of such great weight."