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.
The number of those who had been killed or taken alive on the island was as follows: four hundred and twenty hoplites had crossed over in all; of these two hundred and ninety two were brought to Athens alive; all the rest had been slain. Of those who survived one hundred and twenty were Spartans.[*](ie. citizens of Sparta, the rest being from the neighbouring towns of the Perioeci; cf. 4.8.1.) Of the Athenians, however, not many perished; for it was not a pitched battle.
The time during which the men on the island were under blockade, from the sea fight up to the battle on the island, amounted all told to seventy-two days.