That admiral, whose naval force had been reinforced by a large number of Corcyræan triremes, was committing without opposition incursions against Acarnania, and the western coast of Peloponnesus; insomuch that the expelled Messenians, in their distant exile at Hesperides in Libya, began to conceive hopes of being restored by Athens to Naupactus, which they had occupied under her protection during the Peloponnesian War. And while the Athenians were thus masters at sea both east and west of Peloponnesus, Sparta and her confederates, discouraged by the ruinous failure of their expedition against Corcyra in the preceding year, appear to have remained inactive. With such mental predispositions, they were powerfully affected by religious alarm arising from certain frightful earthquakes and inundations with which Peloponnesus was visited during this year, and which were regarded as marks of the wrath of the god Poseidon. More of these formidable visitations occurred this year in Peloponnesus than had ever before been known; especially one, the worst of all, whereby the two towns of Helice and Bura in Achaia were destroyed, together with a large portion of their population. Ten Lacedæmonian triremes, which happened to be moored on this shore on the night when the calamity occurred, were destroyed by the rush of the waters. Under these depressing circumstances, the Lacedæmonians had recourse to the same manœuvre which had so well served their purpose fifteen years before, in 388-387 B.C. They sent Antalcidas again as envoy to Persia, to entreat both pecuniary aid and a fresh Persian intervention enforcing anew the peace which bore his name; which peace had now been infringed (according to Lacedæmonian construction) by the reconstitution of the Bœotian confederacy under Thebes as president. And it appears that in the course of the autumn or winter, Persian envoys actually did come to Greece, requiring that the belligerents should all desist from war, and wind up their dissensions on the principles of the Peace of Antalcidas. The Persian satraps, at this time renewing their efforts against Egypt, were anxious for the cessation of hostilities in Greece, as a means of enlarging their numbers of Grecian mercenaries; of which troops Timotheus had left Athens a few months before to take the command.