All these monsters have been supposed to represent perils of navigation, especially in the Italian seas, which were frequented by the early Greek navigator. They have also been located geographically, to be sure in a variety of places. The Sirens dwelt on three dangerous rocks near the island of Capraea, according to ancient authorities; or they were found on the promontory between Paestum and Elea, or even down at Cape Pelorum in Sicily. Why should they not be indeed everywhere! Then they have been supposed to personify the secret dangers of a calm sea, and their song is the music of splashing waters. Undoubtedly a physical substrate must be granted in the case of the Sirens, and in the Mythus generally; still they are truly everywhere, not only in the Italian Sea, but also in the sea of life, and they appear not only to the professional sailor but to every human navigator. Are literal rocks passed by putting wax into the ears of the crew and by tying the captain to the mast? Surely some other peril is suggested. In the second adventure, the Plangctae (the Claspers, not the Wanderers, as some translations give it), have been located at the Lipari Islands in the Sicilian Sea, where there is strong volcanic action. The well-known Symplegades of the Argonautic expedition which were placed at the entrance of the Euxine, were probably patterned after this Homeric conception, and transferred to the North-east. The two terrors, Scylla and Charybdis, lie in the straits of Messina, according to the accepted view, the former on the Italian side, the latter on the Sicilian. A town named Scilla still exists in those regions, and an eddy in the straits of Messina is still called Charilla (from Charybdis doubtless.) Etymologically Scylla means a bitch, Charybdis is allied with Chaos (from a Greek word meaning to yawn). Later legend gave to Scylla a great variety of forms, which were reproduced in art and poetry. One story represents her as having been a beautiful maiden who was loved by Glaucus, and who was turned into her present monstrous shape by Circe through jealousy, for the enchantress loved Glaucus too. The sucking-in of the waters by Charybdis, and her disgorging of them has been connected with the ebb and flow of the tides. It may also be added that the Plangctae (in the sense of wandering or floating islands) have been supposed to refer to icebergs, some report of which may have reached the Homeric world through the Phoenician sailor, who must have passed outside of the straits of Gibraltar, into the Atlantic.