undermines the foundations of buildings, and makes them rock to and fro, like the effect produced by the burrowing of moles in the earth. And this is the only kind of earthquake that leaves no trace in the earth of previous habitation. This was the kind of earthquake that rased Helice to the ground. And they say another misfortune happened to the place in the winter at the same time. The sea encroached over much of the district and quite flooded Helice with water: and the grove of Poseidon was so submerged that the tops of the trees alone were visible. And so the god suddenly sending the earthquake, and the sea encroaching simultaneously, the inundation swept away Helice and its population. A similar catastrophe happened to the town of Sipylus which was swallowed up by a landslip. And when this landslip occurred in the rock water came forth, and became a lake called Saloe, and the ruins of Sipylus were visible in the lake, till the water pouring down hid them from view. Visible too are the ruins of Helice, but not quite as clearly as formerly, because they have been effaced by the action of the sea. [13] Hom. Iliad, ii. 575; viii. 203; xx. 404. CHAPTER XXV. One may learn not only from this ruin of Helice but also from other cases that the vengeance of heaven for outrages upon suppliants is sure. Thus the god at Dodona plainly exhorted men to respect suppliants. For to the Athenians in the days of Aphidas came the following message from Zeus at Dodona. “Think of the Areopagus and the smoking altars of the Eumenides, for you must treat as suppliants the Lacedæmonians conquered in battle. Slay them not with the sword, harm not suppliants. Suppliants are inviolable.”