History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
And they did, indeed, take and destroy their [*](τὸ δεκάπλεθρον προτείχισμα.] Arnold supposes this to have been a sort of redoubt, or covering outwork, raised before that part of the line on which the Athenians were at work, to protect the workmen, and to cover the stones, timber, cranes, scaffoldings, and other things used for the building. But the expression seems more suitable for a stationary outwork, than for one which, according to this description, would be moved about as the building progressed; and the last passage in which the building operations are mentioned, transfers them from Epipolae to the cliff, which formed the southern extremity of the high ground above the valley of the Anapus. (See ch. 101. 1, with Arnold's note on it.) It would therefore be better, perhaps, to consider the outwork in question to have been intended as an additional defence for the central point of the lines, τὸν κύκλον in which Nicias might naturally have been left, as the place of greatest security. The engines and timber which were not required for immediate use, might have been kept near the redoubt for the same reason.) outwork of a thousand feet in length, but the lines themselves Nicias prevented their taking, as he happened to have been left behind in them through illness. He ordered the servants to set fire to the engines, and all the timber that had been thrown down in front of the wall; as he knew that for want of men they could not escape in any other way.
And such was the result; for the Syracusans no longer came against them on account of the fire, but withdrew again. Indeed, by this time succours had gone up to the lines from the Athenians below, who had repulsed the enemy in that part; and at the same time their ships from Thapsus were sailing, as they had been ordered, into the great harbour.
At the sight of this, those on the heights retreated with all speed, and the whole army of the Syracusans retired into the city, thinking that they would no longer be able with their present force to prevent the building of the wall down to the sea.
After this, the Athenians erected a trophy, restoring their dead to the Syracusans under a truce, and receiving back those who had fallen with Lamachus, as well as himself. And as they now had with them their whole force, both naval and military, they began from Epipolae and the cliffs, and circumvallated the Syracusans down to the sea with a double wall.