Note 29 — Chapter II · THE EUXINE AND THE BOSPHORUS IN STORY, MYTH AND LEGEND
Reading edition
These alleged appearances of Achilles and the Dioscuri, referred to by Arrian, were evidently the lambent electrical discharges known as St. Elmo’s Fires. They are also called corposant, Helena, and, when in pairs, the Dioscuri—namely, Castor and Pollux.