History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
Meanwhile the Athenians, at the time of the fortifica tion of Decelea, and at the very commencement of the spring, sent thirty ships to cruise round the Peloponnese, under the command of Charicles son of Apollodorus, who was ordered to go to Argos also, and call for a contingent of their heavy-armed to go on board, according to the terms of their alliance.
Demosthenes, too, they despatched to Sicily, as they had intended, with sixty Athenian ships, and five Chian, twelve hundred Athenian heavy-armed from the muster-roll, and as many islanders as they could possibly raise from the several places; while they also supplied themselves from the other subject allies with whatever they could get in any quarter that would be of service for the war. Moreover, he was instructed, as he sailed round, to join Charicles first in his military measures on the coast of Laconia.
So Demosthenes, after sailing to aegina, waited for any part of the armament that might have been left behind, as well as for Charicles to fetch the Argive troops.
In Sicily, about the same period of this spring, Gylippus came to Syracuse, bringing from the cities which he had persuaded to join him as large a number of troops as he respectively could.