The Geography of Strabo (Vol.1-3). Strabo

and the appearances seen in other parts of Sicily, the Lipari and neighbouring islands, and even in the Pithecussæ, with the whole coast beyond them, which prove that it was not unlikely that this convulsion had taken place. But now these mouths being opened, through which the fire is drawn up, and the ardent masses and water poured out, they say that the land in the neighbourhood of the Strait of Sicily rarely suffers from the effects of earthquakes; but formerly all the passages to the surface being blocked up, the fire which was smouldering beneath the earth, together with the vapour, occasioned terrible earthquakes, and the regions, being disturbed by the force of the pent-up winds, sometimes gave way, and being rent received the sea, which flowed in from either side; and thus were formed both this strait and the sea which surrounds the other islands in the neighbourhood. For Prochyta2141 and the Pithecussæ, as well as Capreæ, Leucosia, the Sirenes, and the Œnotrides, are but so many detached fragments from the continent, but other islands have risen from the bottom of the sea, a circumstance which frequently occurs in many places; for it is more reasonable to think that the islands in the midst of the sea have been raised up from the bottom, and that those which lie off headlands and are separated merely by a strait were broken off from them. Still it is beside our purpose to investigate thoroughly whether the name were given to the city for these causes, or whether it were named by the Samnites from the Latin word regium, which signifies royal, on account of its importance,2142