If, at the time that this fleet was at sea, Athens had almost the largest number of first-rate ships in commission that she ever possessed at any one moment, she had as many or even more when the war began. At that time one hundred guarded Attica, Euboea, and Salamis; a hundred more were cruising round Peloponnese, besides those employed at Potidaea and in other places; making a grand total of two hundred and fifty vessels employed on active service in a single summer. It was this, with Potidaea, that most exhausted her revenues- Potidaea being blockaded by a force of heavy infantry (each drawing two drachmae a day, one for himself and another for his servant), which amounted to three thousand at first, and was kept at this number down to the end of the siege; besides sixteen hundred with Phormio who went away before it was over; and the ships being all paid at the same rate. In this way her money was wasted at first; and this was the largest number of ships ever manned by her.
About the same time that the Lacedaemonians were at the Isthmus, the Mitylenians marched by land with their mercenaries against Methymna, which they thought to gain by treachery. After assaulting the town, and not meeting with the success that they anticipated, they withdrew to Antissa, Pyrrha, and Eresus; and taking measures for the better security of these towns and strengthening their walls, hastily returned home. After their departure the Methymnians marched against Antissa, but were defeated in a sortie by the Antissians and their mercenaries, and retreated in haste after losing many of their number. Word of this reaching Athens, and the Athenians learning that the Mitylenians were masters of the country and their own soldiers unable to hold them in check, they sent out about the beginning of autumn Paches, son of Epicurus, to take the command, and a thousand Athenian heavy infantry; who worked their own passage and, arriving at Mitylene, built a single wall all round it, forts being erected at some of the strongest points. Mitylene was thus blockaded strictly on both sides, by land and by sea; and winter now drew near.
The Athenians needing money for the siege, although they had for the first time raised a contribution of two hundred talents from their own citizens, now sent out twelve ships to levy subsidies from their allies, with Lysicles and four others in command. After cruising to different places and laying them under contribution, Lysicles went up the country from Myus, in Caria, across the plain of the Meander, as far as the hill of Sandius; and being attacked by the Carians and the people of Anaia, was slain with many of his soldiers.
The same winter the Plataeans, who were still being besieged by the Peloponnesians and Boeotians, distressed by the failure of their provisions, and seeing no hope of relief from Athens, nor any other means of safety, formed a scheme with the Athenians besieged with them for escaping, if possible, by forcing their way over the enemy's walls; the attempt having been suggested by Theaenetus, son of Tolmides, a soothsayer, and Eupompides, son of Daimachus, one of their generals. At first all were to join: afterwards, half hung back, thinking the risk great; about two hundred and twenty, however, voluntarily persevered in the attempt, which was carried out in the following way. Ladders were made to match the height of the enemy's wall, which they measured by the layers of bricks, the side turned towards them not being thoroughly whitewashed. These were counted by many persons at once; and though some might miss the right calculation, most would hit upon it, particularly as they counted over and over again, and were no great way from the wall, but could see it easily enough for their purpose. The length required for the ladders was thus obtained, being calculated from the breadth of the brick.
Now the wall of the Peloponnesians was constructed as follows. It consisted of two lines drawn round the place, one against the Plataeans, the other against any attack on the outside from Athens, about sixteen feet apart. The intermediate space of sixteen feet was occupied by huts portioned out among the soldiers on guard, and built in one block, so as to give the appearance of a single thick wall with battlements on either side. At intervals of every ten battlements were towers of considerable size, and the same breadth as the wall, reaching right across from its inner to its outer face, with no means of passing except through the middle. Accordingly on stormy and wet nights the battlements were deserted, and guard kept from the towers, which were not far apart and roofed in above.
Such being the structure of the wall by which the Plataeans were blockaded, when their preparations were completed, they waited for a stormy night of wind and rain and without any moon, and then set out, guided by the authors of the enterprise. Crossing first the ditch that ran round the town, they next gained the wall of the enemy unperceived by the sentinels, who did not see them in the darkness, or hear them, as the wind drowned with its roar the noise of their approach; besides which they kept a good way off from each other, that they might not be betrayed by the clash of their weapons. They were also lightly equipped, and had only the left foot shod to preserve them from slipping in the mire. They came up to the battlements at one of the intermediate spaces where they knew them to be unguarded: those who carried the ladders went first and planted them; next twelve light-armed soldiers with only a dagger and a breastplate mounted, led by Ammias, son of Coroebus, who was the first on the wall; his followers getting up after him and going six to each of the towers.
