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.
and he showed them that there was at hand an abundance of wood and stone, that the position was naturally a strong one, and that not only the place itself but also the neighbouring country for a considerable distance was unoccupied; for Pylos is about four hundred stadia distant from Sparta and lies in the land that was once Messenia; but the Lacedaemonians call the place Coryphasium.
The other generals said there were many unoccupied headlands in the Peloponnesus, which he could seize if he wished to put the city to expense. Demosthenes, however, thought that this place had advantages over any other; not only was there a harbour close by, but also the Messenians, who originally owned this land and spoke the same dialect as the Lacedaemonians, would do them the greatest injury if they made this place their base of operations, and would at the same time be a trustworthy garrison of it.
But Demosthenes could not win either the generals or the soldiers to his view, nor yet the commanders of divisions to whom he later communicated his plan; the army, therefore, since the weather was unfavourable for sailing, did nothing. But at length the soldiers themselves, having nothing to do, were seized with the impulse to station themselves around the place and fortify it.
So they set their hands to this task and went to work; they had no iron tools for working stone, but picked up stones and put them together just as they happened to fit; and where mortar was needed, for want of hods, they carried it on their backs, bending over in such a way as would make it stay on best, and clasping both hands behind them to prevent it from falling off.