The Athenian army still numbered 40,000 men; and as all chance of escape by sea was now hopeless, it was resolved to retreat by land to some friendly city, and there defend themselves against the attacks of the Syracusans. As the soldiers turned to quit that fatal encampment, the sense of their own woes was for a moment suspended by the sight of their unburied comrades, who seemed to reproach them with the neglect of a sacred duty; but still more by the wailings and entreaties of the wounded, who clung around their knees, and implored not to be abandoned to certain destruction. Amid this scene of universal woe and dejection, a fresh and unwonted spirit of energy and heroism seemed to be infused into Nicias. Though suffering under an incurable complaint, he was everywhere seen marshalling his troops and encouraging them by his exhortations. The march was directed towards the territory of the Sicels in the interior of the island. The army was formed into a hollow square with the baggage in the middle; Nicias leading the van, and Demosthenes bringing up the rear. The road ascended by a sort of ravine over a steep hill called the Acraean cliff on which the Syracusans had fortified themselves. After spending two days in vain attempts to force this position, Nicias and Demosthenes resolved during the night to strike off to the left towards the sea. But they were overtaken, surrounded by superior forces, and compelled to surrender at discretion. Out of the 40,000 who started from the camp only 10,000 at the utmost were left at the end of the sixth day's march, the rest had either deserted or been slain. The prisoners were sent to work in the stone-quarries of Achradina and Epipolae. Here they were crowded together without any shelter, and with scarcely provisions enough to sustain life. The numerous bodies of those who died were left to putrify where they had fallen, till at length the place became such an intolerable centre of stench and infection that, at the end of seventy days, the Syracusans, for their own comfort and safety, were obliged to remove the survivors, who were sold as slaves. Nicias and Demosthenes were condemned to death in spite of all the efforts of Gylippus and Hermocrates to save them.