This was a most important advantage; indeed, seemingly essential to the successful prosecution of the siege. It was gained by a plan both well laid and well executed, grounded upon the omission of the Syracusans to occupy a post of which they did not at first perceive the importance, and which in fact only acquired its preëminent importance from the new enlargement made by the Syracusans in their fortifications. To that extent, therefore, it depended upon a favorable accident which could not have been reasonably expected to occur. The capture of Syracuse was certain, upon the supposition that the attack and siege of the city had been commenced on the first arrival of the Athenians in the island, without giving time for any improvement in its defensibility. But the moment such delay was allowed, success ceased to be certain, depending more or less upon this favorable turn of accident. The Syracusans actually did a great deal to create additional difficulty to the besiegers, and might have done more, especially in regard to the occupation of the high ground above Epipolæ. Had they taken this precaution, the effective prosecution of the siege would have been rendered extremely difficult, if not completely frustrated.
On the next morning, Nikias and Lamachus marched their army down the slope of Epipolæ near to the Syracusan walls, and offered battle, which the enemy did not accept. They then withdrew the Athenian troops; after which their first operation was to construct a fort on the high ground called Labdalum, near the western end of the upper northern cliffs bordering Epipolæ, on the brink of the cliff, and looking northward towards Megara. This was intended as a place of security wherein both treasures and stores might be deposited, so as to leave the army unencumbered in its motions. The Athenian cavalry being now completed by the new arrivals from Egesta, Nikias descended from Labdalum to a new position called Sykê, lower down on Epipolæ, seemingly about midway between the northern and southern cliffs. He here constructed, with as much rapidity as possible, a walled inclosure, called the Circle, intended as a centre from whence the projected wall of circumvallation was to start northward towards the sea at Trogilus, southward towards the Great Harbor. This Circle appears to have covered a considerable space, and was farther protected by an outwork in front covering an area of one thousand square feet.[371] Astounded at the rapidity with which the Athenians executed this construction,[372] the Syracusans marched their forces out, and prepared to give battle in order to interrupt it. But when the Athenians, relinquishing the work, drew up on their side in battle order, the Syracusan generals were so struck with their manifest superiority in soldier-like array, as compared with the disorderly trim of their own ranks, that they withdrew their soldiers back into the city without venturing to engage; merely leaving a body of horse to harass the operations of the besiegers, and constrain them to keep in masses. The newly-acquired Athenian cavalry, however, were here brought for the first time into effective combat. With the aid of one tribe of their own hoplites, they charged the Syracusan horse, drove them off with some loss, and erected their trophy. This is the only occasion on which we read of the Athenian cavalry being brought into conflict; though Nikias had made the absence of cavalry the great reason for his prolonged inaction.
Interruption being thus checked, Nikias continued his blockading operations; first completing the Circle,[373] then beginning his wall of circumvallation in a northerly direction from the Circle towards Trogilus: for which purpose a portion of his forces were employed in bringing stones and wood, and depositing them in proper places along the intended line. So strongly did Hermokratês feel the inferiority of the Syracusan hoplites in the field, that he discouraged any fresh general action, and proposed to construct a counter-wall, or cross-wall, traversing the space along which the Athenian circumvallation must necessarily be continued so as to impede its farther progress. A tenable counter-wall, if they could get time to carry it sufficiently far to a defensible terminus, would completely defeat the intent of the besiegers: but even if Nikias should interrupt the work by his attacks, the Syracusans calculated on being able to provide a sufficient force to repel them, during the short time necessary for hastily constructing the palisade, or front outwork. Such palisade would serve them as a temporary defence, while they finished the more elaborate cross-wall behind it, and would, even at the worst, compel Nikias to suspend all his proceedings and employ his whole force to dislodge them.[374]
Accordingly, they took their start from the postern-gate near the grove of Apollo Temenitês; a gate in the new wall, erected four or five months before, to enlarge the fortified space of the city. From this point, which was lower down on the slope of Epipolæ than the Athenian circle, they carried their palisade and counter-wall up the slope, in a direction calculated to intersect the intended line of hostile circumvallation southward of the Circle. The nautical population from Ortygia could be employed in this enterprise, since the city was still completely undisturbed by sea, and mistress of the great harbor, the Athenian fleet not having yet moved from Thapsus. Besides this active crowd of workmen, the sacred olive-trees in the Temenite grove were cut down to serve as materials; and by such efforts the work was presently finished to a sufficient distance for traversing and intercepting the blockading wall intended to come southward from the Circle. It seems to have terminated at the brink of the precipitous southern cliff of Epipolæ, which prevented the Athenians from turning it and attacking it in flank; while it was defended in front by a stockade and topped with wooden towers for discharge of missiles. One tribe of hoplites was left to defend it, while the crowd of Syracusans who had either been employed on the work or on guard, returned back to the city.
During all this process, Nikias had not thought it prudent to interrupt them.[375] Employed as he seems to have been on the Circle, and on the wall branching out from his Circle northward, he was unwilling to march across the slope of Epipolæ to attack them with half his forces, leaving his own rear exposed to attack from the numerous Syracusans in the city, and his own Circle only partially guarded. Moreover, by such delay, he was enabled to prosecute his own part of the circumvallation without hindrance, and to watch for an opportunity of assaulting the new counter-wall with advantage. Such an opportunity soon occurred, just at the time when he had accomplished the farther important object of destroying the aqueducts, which supplied the city, partially at least, with water for drinking. The Syracusans appear to have been filled with confidence, both by the completion of their counter-wall, which seemed an effective bar to the besiegers, and by his inaction. The tribe left on guard presently began to relax in their vigilance: instead of occupying the wall, tents were erected behind it to shelter them from the midday sun; while some even permitted themselves to take repose during that hour within the city walls. Such negligence did not escape the Athenian generals, who silently prepared an assault for midday. Three hundred chosen hoplites, with some light troops clothed in panoplies for the occasion, were instructed to sally out suddenly and run across straight to attack the stockade and counter-wall; while the main Athenian force marched in two divisions under Nikias and Lamachus; half towards the city walls, to prevent any succor from coming out of the gates, half towards the Temenite postern-gate from whence the stockade and cross-wall commenced. The rapid forward movement of the chosen three hundred was crowned with full success. They captured both the stockade and the counter-wall, feebly defended by its guards; who, taken by surprise, abandoned their post and fled along behind their wall to enter the city by the Temenite postern-gate. Before all of them could get in, however, both the pursuing three hundred, and the Athenian division which marched straight to that point, had partially come up with them: so that some of these assailants even forced their way along with them through the gate into the interior of the Temenite city wall. Here, however, the Syracusan strength within was too much for them: these foremost Athenians and Argeians were thrust out again with loss. But the general movement of the Athenians had been completely triumphant. They pulled down the counter-wall, plucked up the palisade, and carried the materials away for the use of their own circumvallation.
As the recent Syracusan counter-work had been carried to the brink of the southern cliff, which rendered it unassailable in flank, Nikias was warned of the necessity of becoming master of this cliff, so as to deprive them of this resource in future. Accordingly, without staying to finish his blockading wall, regularly and continuously from the Circle southward, across the slope of Epipolæ, he left the Circle under a guard, and marched across at once to take possession of the southern cliff, at the point where the blockading wall was intended to reach it. This point of the southern cliff he immediately fortified as a defensive position, whereby he accomplished two objects. First, he prevented the Syracusans from again employing the cliff as a flank defence for a second counter-wall.[376] Next, he acquired the means of providing a safe and easy road of communication between the high ground of Epipolæ and the low marshy ground beneath, which divided Epipolæ from the Great Harbor, and across which the Athenian wall of circumvallation must necessarily be presently carried. As his troops would have to carry on simultaneous operations, partly on the high ground above, partly on the low ground beneath, he could not allow them to be separated from each other by a precipitous cliff which would prevent ready mutual assistance. The intermediate space between the Circle and the fortified point of the cliff, was for the time left with an unfinished wall, with the intention of coming back to it, as was in fact afterwards done, and this portion of wall was in the end completed. The Circle, though isolated, was strong enough for the time to maintain itself against attack, and was adequately garrisoned.
By this new movement, the Syracusans were debarred from carrying a second counter-wall on the same side of Epipolæ, since the enemy were masters of the terminating cliff on the southern side of the slope. They now turned their operations to the lower ground or marsh between the southern cliff of the Epipolæ and the Great Harbor; being as yet free on that side, since the Athenian fleet was still at Thapsus. Across that marsh—and seemingly as far as the river Anapus, to serve as a flank barrier—they resolved to carry a palisade work with a ditch, so as to intersect the line which the Athenians must next pursue in completing the southernmost portion of their circumvallation. They so pressed the prosecution of this new cross palisade, beginning from the lower portion of their own city walls, and stretching in a southwesterly direction across the low ground as far as the river Anapus, that, by the time the new Athenian fortification on the cliff was completed, the new Syracusan obstacle was completed also, and a stockade with a ditch seemed to shut out the besiegers from reaching the Great Harbor.
Lamachus overcame the difficulty before him with ability and bravery. Descending unexpectedly, one morning before daybreak, from his fort on the cliff of Epipolæ into the low ground beneath,—and providing his troops with planks and broad gates to bridge over the marsh where it was scarcely passable,—he contrived to reach and surprise the palisade with the first dawn of morning. Orders were at the same time given for the Athenian fleet to sail round from Thapsus into the Great Harbor, so as to divert the attention of the enemy, and get on the rear of the new palisade work. But before the fleet could arrive, the palisade and ditch had been carried, and its defenders driven off. A large Syracusan force came out from the city to sustain them, and retake it, so that a general action now ensued, in the low ground between the cliff of Epipolæ, the harbor, and the river Anapus. The superior discipline of the Athenians proved successful: the Syracusans were defeated and driven back on all sides, so that their right wing fled into the city, and their left (including the larger portion of their best force, the horsemen), along the banks of the river Anapus, to reach the bridge. Flushed with victory, the Athenians hoped to cut them off from this retreat, and a chosen body of three hundred hoplites ran fast in hopes of getting to the bridge first. In this hasty movement they fell into disorder, so that the Syracusan cavalry turned upon them, put them to flight, and threw them back upon the Athenian right wing, to which the fugitives communicated their own panic and disorder. The fate of the battle appeared to be turning against the Athenians, when Lamachus, who was on the left wing, hastened to their aid with the Argeian hoplites and as many bowmen as he could collect. His ardor carried him incautiously forward, so that he crossed a ditch with very few followers, before the remaining troops could follow him. He was here attacked and slain,[377] in single combat with a horseman named Kallikratês: but the Syracusans were driven back when his soldiers came up, and had only just time to snatch and carry off his dead body, with which they crossed the bridge and retreated behind the Anapus. The rapid movement of this gallant officer was thus crowned with complete success, restoring the victory to his own right wing: a victory dearly purchased by the forfeit of his own life.[378]
Meanwhile the visible disorder and temporary flight of the Athenian right wing, and the withdrawal of Lamachus from the left to reinforce it, imparted fresh courage to the Syracusan right, which had fled into the town. They again came forth to renew the contest; while their generals attempted a diversion by sending out a detachment from the northwestern gates of the city to attack the Athenian circle on the mid-slope of Epipolæ. As this Circle lay completely apart and at considerable distance from the battle, they hoped to find the garrison unprepared for attack, and thus to carry it by surprise. Their manœuvre, bold and well-timed, was on the point of succeeding. They carried with little difficulty the covering outwork in front, and the Circle itself, probably stripped of part of its garrison to reinforce the combatants in the lower ground, was only saved by the presence of mind and resource of Nikias, who was lying ill within it. He directed the attendants immediately to set fire to a quantity of wood which lay, together with the battering engines of the army, in front of the circle-wall, so that the flames prevented all farther advance on the part of the assailants, and forced them to retreat. The same flames also served as a signal to the Athenians engaged in the battle beneath, who immediately sent reinforcements to the relief of their general; while at the same time the Athenian fleet, just arrived from Thapsus, was seen sailing into the Great Harbor. This last event, threatening the Syracusans on a new side, drew off their whole attention to the defence of their city, so that both their combatants from the field and their detachment from the Circle were brought back within the walls.[379]
Had the recent attempt on the Circle succeeded, carrying with it the death or capture of Nikias, and combined with the death of Lamachus in the field on that same day, it would have greatly brightened the prospects of the Syracusans, and might even have arrested the farther progress of the siege, from the want of an authorized commander. But in spite of such imminent hazard, the actual result of the day left the Athenians completely victorious, and the Syracusans more discouraged than ever. What materially contributed to their discouragement, was, the recent entrance of the Athenian fleet into the Great Harbor, wherein it was henceforward permanently established, in coöperation with the army in a station near the left bank of the Anapus.