Nicias, having received reinforcements from Athens, recommenced hostilities as soon as the season allowed of it, and resolved on besieging Syracuse. That town consisted of two parts--the inner and the outer city. The former of these--the original settlement was comprised in the island of Ortygia; the latter afterwards known by the name of Achradina, covered the high ground of the peninsula north of Ortygia, and was completely separate from the inner city. The island of Ortygia, to which the modern city is now confined, is of an oblong shape, about two miles in circumference, lying between the Great Harbour on the west, and the Little Harbour on the east, and separated from the mainland by a narrow channel. The Great Harbour is a splendid bay, about five miles in circumference, and the Little Harbour was spacious enough to receive a large fleet of ships of war. The outer city was surrounded on the north and east by the sea and by sea-walls which rendered an assault on that side almost impracticable. On the land side it was defended by a wall, and partly also by the nature of the ground, which in some part was very steep. West and north-west of the wall of the outer city stood two unfortified suburbs, which were at a later time included within the walls of Syracuse under the names of Tyche and Neapolis. Between these two suburbs the ground rose in a gentle acclivity to the summit of the ranges of hills called Epipolae. It was from the high ground of Epipolae that Syracuse was most exposed to attack. Nicias landed at Leon, a place upon the bay of Thapsus, at the distance of only six or seven stadia from Epipolae, took possession of Epipolae, and erected on the summit a fort called Labdalum. Then coming farther down the hill towards Syracuse, he built another fort of a circular form and of considerable size at a place called Syke. From the latter point he commenced his line of circumvallation, one wall extending southwards from Syke to the Great Harbour, and the other wall running northwards to the outer sea. The Athenians succeeded in completing the circumvallation towards the south, but in one of their many engagements with the Syracusans they lost the gallant Lamachus. At the same time, the Athenian fleet entered the Great Harbour, where it was henceforth permanently established. The northern wall was never completed, and through the passage thus left open the besieged continued to obtain provisions. Nicias, who, by the death of Lamachus, had become sole commander, seemed now on the point of succeeding. The Syracusans were so sensible of their inferiority in the field that they no longer ventured to show themselves outside the walls. They began to contemplate surrender, and even sent messages to Nicias to treat of the terms. This caused the Athenian commander to indulge in a false confidence of success, and consequent apathy; and the army having lost the active and energetic Lamachus, operations were no longer carried on