Note 5 — CHAPTER THE FIRST

Some authors give various measurements. Legrand says that the biggest arch had a span of thirty-four metres, and that its greatest height, when intact, was thirty-two metres. I cannot do better than refer you to Choisy’s “Art de bâtir chez les Romains,” Paris, 1874. Several ancient writers—Claudian, Procopius, and Martial—guide Sir William Smith in his remarks on Narni Bridge, but he makes a mistake when he speaks of “three” arches.