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.
The Athenians in the same summer made an expedition against Cythera, with sixty ships, two thousand heavy-armed, and a few cavalry, taking with them also from amongst the allies the Milesians and some others; under the command of Nicias son of Niceratus, Nicostratus son of Diotreplles, and Autocles son of Tolmaeus.
This Cythera is an island lying off Laconia, opposite to Malea. The inhabitants are Laconians, of the class of the perioeci, and an officer called the Judge of Cythera went over to the place annually. They also sent over regularly a garrison of heavy-armed, and paid great attention to it.
For it was their landing-place for the merchantmen from Egypt and Libya; and at the same time privateers were less able to annoy Laconia from the sea, the only side on which it could be injured; for the whole of it runs out toward the Sicilian and Cretan seas.
The Athenians therefore, having made the land with their armament, with ten of their ships and two thousand heavy-armed of the Milesians, took the town on the coast called Scandea; while with the rest of their forces they landed on the side of the island looking towards Malea, and advanced against the lower town of Cythera, and at once found all the inhabitants encamped there.
A battle having been fought, the Cytherians stood their ground for some short time, and then turned and fled into the upper town; after which they came to an agreement with Nicias and his colleagues to throw themselves on the mercy of the Athenians, only stipulating that they should not be put to death.
Indeed there had been before certain proposals made by Nicias to some of the Cytherians, in consequence of which the terms of the capitulation were settled more quickly and favourably, both for their present and future interests: else the Athenians would have expelled the Cytherians, both on the ground of their being Lacedaemonians and of the island being so adjacent to Laconia.