Perceiving their intention, the Syracusans began a second counterwork, consisting of a stockade and ditch, which started at the point of junction between the old city-wall and the new, and ran across the low swampy ground as far as the Anapus. Thus the Athenians were confronted by a new obstacle, which had to be removed, before they could make any further progress. Acting with energy and decision, they sent orders to the fleet, which was still lying at Thapsus, to sail round into the Great Harbour; and without waiting for its arrival, before daybreak Lamachus led his troops down the cliff, and advanced against the stockade. His men carried hurdles and planks, to secure their footing in the most treacherous parts of the swamp, and, proceeding thus, in the first light of dawn they came up to the stockade. They found the Syracusans assembled in force to resist them, and an engagement ensued, which speedily ended in favour of the Athenians. The right wing of the Syracusan army fled back into the city, while the left wing retreated towards the suburb of Polichne, hotly pursued by the picked troop [Footnote: P. 203.] of Athenian hoplites, who wished to cut them off before they reached the river. By this rash movement the Athenians came near to forfeiting the advantage which they had gained, and brought upon themselves an irreparable loss. For the Syracusan cavalry turned on their pursuers, and drove them back in disorder upon the Athenian right. The sudden reverse created something like a panic in that part of the line, and Lamachus, who was in command of the left wing, hastened to their relief, and threw himself, with a handful of men, between the Syracusan cavalry and the fugitives. This gallant action turned the tide of battle once more, and gave the Athenians on the right wing time to rally; but Lamachus and his followers, pushing forward too hotly, were attacked by the enemy in a place where their retreat was cut off by a ditch, and slain to a man.