XVII. Thus when he did at length return to Syracuse, he managed the operation so swiftly and so skilfully that he disembarked his troops at Thapsus before the enemy were aware of his approach, took Epipolæ by surprise, took prisoners three hundred of the force of picked men who endeavoured to recapture that fort, and routed the Syracusan cavalry, which had hitherto been supposed to be invincible. Moreover, what chiefly terrified the Sicilians, and seemed wonderful to all Greeks, was the speed with which he built a wall round Syracuse, a city quite as large as Athens itself, but one which is much more difficult to invest completely, because of the sea being so near to it, and the rough ground and marshes by which it is surrounded on the land side. Yet he all but succeeded in accomplishing this feat, although he was not in a condition of body to superintend such works personally, for he suffered greatly from a disease of the kidneys, to which we must attribute whatever was left undone by his army. For my own part I feel great admiration for the diligence and skill of the general, and for the bravery of the soldiers, which enabled them to gain such successes. The poet Euripides, after their defeat and utter overthrow wrote this elegy upon them: "Eight times they beat the Syracusan host, Before the gods themselves declared them lost." Indeed, they beat the Syracusans far more than eight times, before the gods turned against the Athenians and dashed them to the ground when at the height of their pride. XVIII. Nikias was present, in spite of his sufferings, at most of these actions; but when his disease grew worse, he was forced to stay in the camp with a small guard, while Lamachus took the command of the army, and fought a battle with the Syracusans, who were endeavouring to build a counter-wall which would obstruct the Athenians in building their wall of circumvallation. The Athenians were victorious, but followed up their success in such a disorderly manner that Lamachus was left alone and exposed to the attacks of the Syracusan cavalry. He at once challenged their leader, a brave man named Kallimachus, to single combat, and both received and inflicted a mortal wound. His dead body and arms fell into the hands of the Syracusans, who at once charged up to the Athenian walls, where Nikias lay helpless. The extremity of the danger roused him, and he ordered his attendants to set fire to a quantity of timber which had been brought thither to construct military engines, and to some of the engines themselves. This desperate expedient checked the Syracusans, and saved Nikias and the Athenians; for the rest of the Syracusan forces on perceiving so great a body of flame returned in haste to their city.