Note 3898 — BOOK V. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST OR FORMERLY EXISTED.
John Bostock translation
So called from Ἥφαιστος, the Greek name of Vulcan. Pliny mentions this spot also in B. ii. c. 110. The flame probably proceeded from an inflammable gas, or else was ignited by a stream of naphtha.