Note 3 — Chapter XIII
Reading edition
See the siege of Alesia, vii. 72, or the circumvallation of Pompey at Dyrrachium, by Cæsar’s army, Bell. Civ. iii. 42. The lines of Torres Vedras, drawn by the British in the Peninsular war, may however compete, for their extent and the labour bestowed on them, with any of these ancient works.