The change from the inauspicious word Avernus, which stands in the text, is immaterial. The two lakes, Avernus and Lucrinus, communicated with each other, and were fashioned by the stupendous moles of Agrippa into the Julian port, which opened through a narrow entrance into the gulf of Puteoli. Virgil, who resided on the spot, has described (Georgic ii. 161) this work at the moment of its execution: and his commentators, especially Catrou, have derived much light from Strabo, Suetonius, and Dion. Earthquakes and volcanoes have changed the face of the country, and turned the Lucrine lake, since the year 1538, into the Monte Nuovo. See Camillo Pellegrino Discorsi della Campania Felice, p. 239, 244, etc. Antonii Sanfelicii Campania, p. 13, 88.