History of the Peloponnesian War

But the Corinthians and the allies were not sailing to Acarnania with any intention to fight by sea, but were equipped more for land service. When, however, they saw them sailing along opposite to them, as they themselves proceeded along their own coast; and on attempting to cross over from Patrae in Achaia to the mainland opposite, on their way to Acarnania, observed the Athenians sailing against them from Chalcis and the river Evenus; (for they had not escaped their observation when they had endeavoured to bring to secretly during the night;) under these circumstances they were compelled to engage in the mid passage.