History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And as all used for the most part the same vessels and there was a great display of them everywhere, it caused great astonishment to the Athenians from the triremes, and they on returning to Athens spread the report of how much treasure they had seen.
And these men who had been themselves deceived and had at the time persuaded the rest, later, when the story got out that the money was not at Egesta, were much blamed by the soldiers. The generals, however, took counsel in view of the present situation.
It was the judgment of Nicias that they should sail with their whole armament against Selinus, which was the object for which they had chiefly been sent out, and if the Egestaeans should furnish money for the whole army, they should then determine accordingly; otherwise, they should demand that they give maintenance for sixty ships, the number they had asked for, and remaining there they should reconcile the Selinuntians to the Egestaeans, either by force or by agreement. This being accomplished, the Athenians should sail along by the other cities, displaying the power of the city of Athens and making manifest their zeal towards their friends and allies, and then should sail back home—unless perchance they should be able quickly and unexpectedly either to aid the Leontines, or to bring over some of the other cities—and not imperil the safety of the state at the expense of their own resources.[*](As opposed to those of the Egestaeans.)
Alcibiades insisted that they ought not, after sailing out with so great an armament, to go back in disgrace without effecting anything; but urged rather that they send heralds to the other cities, except Selinus and Syracuse, and try to detach some of the Sicels from the Syracusans, and to make friends of others, in order that these might furnish grain and troops, but first of all that they try to persuade the Messenians; for their city, he urged, was most conveniently situated on a line of traffic[*](ἐν πόρῳ is used of the position of Corinth, 1.120.2.) and at the approach to Sicily and would be a harbour and a most suitable watch-station for the armament. Then, after they had brought over these cities and knew with whose assistance they would carry on the war, they should proceed to attack Syracuse and Selinus, unless the latter came to terms with the Egestaeans, and the former permitted them to restore the Leontines.