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.
They decided to sail to Himera, especially since the four Athenian ships—which Nicias did after all[*](Nicias had paid little attention to the first reports of the approach of Gylippus, thinking that he was on a privateering mission rather than on one of war (6.104.3).) despatch when he learned that the enemy's ships were at Locri—had not yet arrived at Rhegium. They succeeded in crossing the strait before the arrival of this watch-squadron, and after touching at Rhegium and Messene, arrived at Himera.
While there they persuaded the Himeraeans to help them in the war, not only by going on the expedition themselves, but also by furnishing arms for such of the crews of their ships as had none (for their ships they had beached at Himera), and also sent a request to the Selinuntians to meet them at a certain place with all their forces.
A small body of troops was also promised them by the Geloans and some of the Sicels, who were now ready to join them with far greater alacrity, both because of the recent death of Archonidas, who, being king of certain Sicel tribes of that region and a man of influence, had been a friend of the Athenians, and also because Gylippus had apparently come from Lacedaemon full of zeal.
So Gylippus, taking of his own seamen and of the marines those that were equipped with arms, about seven hundred, of Himeraean hoplites and light-armed troops together one thousand and one hundred cavalry, of the Selinuntians some light-armed troops and cavalry, a few Geloans, and of the Sicels about one thousand in all, advanced against Syracuse.