History of the Peloponnesian War

After speaking to the captains of companies on the subject, and failing to persuade either the generals or the soldiers, he remained inactive with the rest from stress of weather; until the soldiers themselves wanting occupation were seized with a sudden impulse to go round and fortify the place.

Accordingly they set to work in earnest, and having no iron tools, picked up stones, and put them together as they happened to fit, and where mortar was needed, carried it on their backs for want of hods, stooping down to make it stay on, and clasping their hands together behind to prevent it falling off;

sparing no effort to be able to complete the most vulnerable points before the arrival of the Lacedaemonians, most of the place being sufficiently strong by nature without further fortification.