Note 2931 — BOOK IV. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST OR FORMERLY EXISTED.
John Bostock translation
Afterwards called Bononia, the modern Boulogne. As D’Anville remarks, the distance here given by Pliny is far too great, whether we measure to Dover or to Hythe; our author’s measurement however is probably made to Rutupiæ (the modern Richborough), near Sandwich, where the Romans had a fortified post, which was their landing-place when crossing over from Gaul. This would make the distance given by Pliny nearer the truth, though still too much.