History of the Peloponnesian War

For when they had been carried by a tempest to Libya, and the Cyrenaeans had given them two triremes, and pilots for their voyage, during their passage along shore they entered into alliance with the Euesperitae, who were being besieged by the Libyans, and defeated the latter people; and after coasting along thence to Neapolis, an emporium of the Carthaginians, from which the distance is shortest to Sicily, namely, a voyage of two days and a night, they crossed over there from that place, and arrived at Selinus.

Immediately on their arrival, the Syracusans prepared to attack the Athenians again on both sides, by sea and by land. When the Athenian generals, on the other hand, saw that a fresh force had joined them, and that their own circumstances at the same time were not improving, but were daily becoming worse, and most especially were depressed through the sickness of the men, they repented of not having removed before. And as even Nicias did not now oppose them in the same degree, except by begging them not openly to vote on the question, they gave orders, as secretly as they could, for all to sail out of their station, and to be ready when the signal should be given.