When Demosthenes arrived at Syracuse, the position of affairs was as follows: the blockading wall of the Athenians still extended in an unbroken line from the circular fort on Epipolae to the camp and naval station of Nicias at the head of the Great Harbour; but the Athenians were cut off from access to the northern slope of Epipolae by the Syracusan counterwall, which had been carried up the whole length of the plateau as far as the hill of Euryelus. Along the northern edge of the cliff the Syracusans had established three fortified camps, where the defenders of the counterwall had their quarters, and on the summit of Euryelus a fort had been erected, which held the key to the whole system of defence.

Demosthenes saw at once that, before any progress could be made with the siege of Syracuse, it was necessary to gain possession of the counterwall, and confine the Syracusans within the limits of their city. The sooner he made the attempt, the greater was his chance of success; for every day wasted would give new confidence to the enemy, and the condition in which he found the troops of Nicias was a visible warning against the fatal consequences of delay. An attack made on the cross-wall from its southern side ended in total failure; his siege-engines were burnt, and the storming-parties repulsed at every point. The only course which remained was to march round to the north-western extremity of the plateau, carry the fort of Euryelus, and assail the Syracusans within their own lines. After consulting with his colleagues, Demosthenes determined to try the hazardous method of a night-attack, hoping thus to take the garrison on Euryelus by surprise. He himself, with Eurymedon and Menander, took the command, and the whole Athenian army was engaged in the adventure, except those who remained behind with Nicias to guard the camp. On a moonlight night in August, at the hour of the first watch, the march began. Moving cautiously up the valley of the Anapus, they turned the northern end of the hill, and reached the path by which Lamachus had ascended in the spring of the previous year. At first all seemed to promise success to the Athenians unobserved by the enemy, Demosthenes ascended the hill, stormed the fort, and, drove the garrison back on the three fortified camps which flanked the Syracusan counterwall on its northern side. The fugitives raised the alarm, and the call was promptly answered by a picked troop of six hundred hoplites, who were stationed nearest to the point of danger. These men made a gallant stand, but they were overpowered by superior numbers, and thrust back on the main body of the Syracusans, who were now advancing under Gylippus to the rescue. They in their turn were forced to give ground before the impetuous charge of Demosthenes, and a general panic seemed about to spread through the whole Syracusan army. Already the Athenians had begun to throw down the battlements of the counterwall, and if they were allowed to proceed, Syracuse would once more be exposed to imminent danger.

But now occurred one of those sudden turns of fortune which were so common in Greek warfare. As the soldiers of the Athenian van rushed forward too hotly, wishing to complete the rout of the enemy they fell into disorder, and in this condition they were confronted by a stout little troop of Boeotian hoplites, who had found their way to Syracuse earlier in the summer. This unexpected resistance checked the furious onset of the Athenians, and the Boeotians, pursuing their advantage, charged in solid phalanx and put them to flight. Once more the tide of battle had turned against Athens. Restored to confidence by the steady valour of their allies, the Syracusans closed their ranks, and advanced in dense masses up the hill. A scene of indescribable horror and confusion ensued, so that no one was afterwards able to give a clear account of what had happened. On the narrow neck of land which forms the western end of Epipolae two great armies were rushing to the encounter. On one side was the main body of the Athenians, still ignorant of the defeat of their comrades, and hurrying forward to share in the victory. On the other side was the whole host of Syracuse, advancing with deafening shouts to meet them; and in the middle were the men of Demosthenes, flying in headlong rout before the conquering Boeotians. In the uncertain light, the fugitives were at first mistaken for enemies, and many of them perished miserably by the spears of their own countrymen. On came the Syracusans, bearing down all before them; but the Athenians, as they strove to escape, were flung back upon the enemy by fresh bodies of their own men, who were still thronging by thousands up the northern path of Euryelus. All semblance of order was now lost in the Athenian army, which was broken up into detached parties, some flying, some advancing, and shouting their watchword to all whom they met, so as to learn whether they had to do with friend or foe. But the Syracusans soon learnt the watchword, which thus became a means of betraying the Athenians to their own destruction. To add to the confusion, the Dorian allies of Athens raised a paean, or war-song, so similar to that of the Syracusans, that the Athenians fled at their approach supposing them to be enemies. The grand army of Demosthenes, which had set out with such high hopes, was now no better than a mob of wild and desperate men, friend fighting against friend, and citizen against citizen. At length the whole multitude turned and fled, each man seeking to save himself as best he could. Some, hard pressed by the enemy, flung themselves from the cliffs, and were dashed to pieces on the rocks below; others succeeded in reaching the plain, and found their way back to the camp of Nicias; while not a few lost their way, and wandered about the country until the following day, when they were hunted down and slain by the Syracusan horseman.

Demosthenes had done all that a man could to recover the ground lost by Nicias, and resume the aggressive against Syracuse. His well-laid scheme had ended disastrously, and only one course remained, consistent with public duty and common sense. To waste the blood and treasure of Athens in Sicily any longer would be suicidal folly. The Athenians at home were in a state of siege, and needed every man and every ship for the defence of their own territory, and the maintenance of their empire in Greece. Sickness and despondency had already wrought dire havoc among the troops encamped before Syracuse. To remain was utter ruin, both to themselves and their fellow-citizens. The sea was still open, and the new armament, with what remained of the old, would be strong enough to secure their retreat. Let them embark without delay, turn their backs on the fatal shores of Sicily, and hoist sail for home.

These arguments were urged by Demosthenes with unanswerable force at a private meeting of the generals which was held immediately after the defeat on Epipolae But unhappily for all those most nearly concerned in the debate, the influence of Nicias was still supreme in the Athenian camp; and to spur that gloomy trifler into decisive action was beyond the power even of Demosthenes. Nicias knew that, if he gave the word to retreat, in a few weeks he would have to stand before the bar of his countrymen, and give an account of the great trust which he had betrayed. It would be better, he thought, to perish under the walls of Syracuse, than to brave that stern tribunal, and read his doom on those angry, accusing faces. And apart from these selfish terrors, he was still in communication with his partisans in Syracuse, who encouraged him to wait for a favourable turn of affairs. Thus fettered to the spot both by his hopes and his fears, he obstinately refused to move.

While Demosthenes argued, and Nicias demurred, Gylippus had not been idle. A day or two after the battle, he once more left Syracuse, and traversed the whole length of the island, collecting troops on his way. At Selinus he was joined by the Peloponnesian and Boeotian soldiers who had sailed from Taenarum early in the spring, and had just reached that port, after a long and adventurous voyage. With this welcome addition to his forces, and thousands more who had answered his call from all parts of Sicily, he returned to Syracuse, and prepared to put out all his strength in a general assault on the army and fleet of Athens.

The Athenians had not yet abandoned their lines on the southern side of Epipolae, and from this position they watched the arrival of the new army raised by Gylippus, as it defiled down the slope, and poured through the gates of Syracuse to swell the ranks of their enemies. In their own camp the state of things was growing worse every day, and even Nicias now became convinced that to remain any longer would be sheer madness. With the hearty concurrence of his colleagues, he gave his vote for immediate departure, and the order was secretly passed round the camp that every man should hold himself in readiness to go on board, as soon as the signal was given. It was necessary to proceed with caution, for if the enemy were informed of their purpose, they would have to fight their way through the Syracusan fleet. The preparations were accordingly made with as little noise as possible and in a short time all was ready for the voyage. Night sank down on the Athenian camp, but among all that vast multitude no one thought of sleep, for the whole host was waiting in breathless eagerness for the signal to embark. Over the eastern waters the full moon was shining, making a long path of silver and pointing the way to home. But suddenly a dark shadow touched the outer rim of that gleaming disk, and crept stealthily on, until the whole face of the moon was veiled in darkness. A whisper, a murmur, a shudder went round among those anxious watchers, and before the shadow had passed away, ten thousand tongues were eagerly discussing the meaning of that mysterious portent. Most were agreed that it was a warning from heaven, forbidding their departure until the angry powers had been appeased by sacrifice and prayer. In the mind of Nicias, enslaved by the grossest superstition, there was no room for doubt. He was surrounded by prophets, whose advice he sought on every occasion, and guided by them he proclaimed that for thrice nine days, the time required for a complete circuit of the moon, there could be no talk of departing.

But the Athenians were soon engaged in a sterner task than the vain rites of propitiation and penitential observance. The news of their intended retreat, and its untoward interruption, so raised the spirits of the Syracusans, that they resolved to risk another sea-fight, and after some days spent in training their crews, they sailed out with seventy-six ships, and offered battle, and Gylippus at the same time attacked the Athenian lines by land. The Athenians succeeded in repulsing the assault on their walls, but in the encounter between the fleets, though they out-numbered the enemy by ten ships, they suffered a decisive defeat. Eurymedon was slain, and eighteen vessels fell into the hands of the Syracusans, who put all the crews to the sword.

The pride and ambition of the Syracusans now knew no bounds. Relieved from all fear for the safety of their city they began to take a loftier view of the struggle, and to grasp the full compass and grandeur of the issues involved. It was no mere feud between two rival states, but a great national conflict, which was to end in the downfall of a wide-spread usurpation, and the deliverance of a hundred cities from bondage. The whole naval and military forces of Athens lay crippled and helpless within their grasp; they would shatter to pieces the instrument of tyranny, and win an immortal name as the liberators of all Greece. Their first care was to prevent the escape of the Athenians, and for this purpose they began to close the mouth of the Great Harbour by a line of triremes and vessels of burden, anchored broadside across the channel.

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