History of the Peloponnesian War

But their greatest discouragement arose from the unexpectedly long time which it took to reduce a body of men shut up in a desert island, with only brackish water to drink, a matter which they had imagined would take them only a few days.

The fact was, that the Lacedaemonians had made advertisement for volunteers to carry into the island ground corn, wine, cheese, and any other food useful in a siege; high prices being offered, and freedom promised to any of the Helots who should succeed in doing so.