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.
Having established a garrison in Labdalum, the Athenians advanced to Syca, where they posted themselves. and built with all speed [*](ἐτειχισαν τὸν κύκλον] To avoid appearing to assert that the whole line of circumvallation was at once completed, I have rendered κύκλον in this passage by one of the terms applied to it in Arnold's note; where he says that ὁ κύκλος which is spoken of as finished, was on the one hand a part of the circumvallation, but was also a complete work in itself,—something, that is, of an entrenched camp, which was to be the point of junction and key of the two lines which were to run respectively to the sea by Trogilus, and to the great harbour, etc.) the central point of their wall of circumvallation. They struck the Syracusans with consternation by the rapidity of their building; and consequently they resolved to march out against them and give them battle, and not allow them to proceed with the work.
When they were now being drawn up in battle-array against each other, the Syracusan generals, perceiving that their forces were broken, and did not easily fall into line, led them back again into the city, excepting some part of their cavalry.
These, staying behind, prevented the Athenians from carrying their stones, or dispersing to any great distance; until [*]( We learn from Herodotus, VI. 111. 2, that the soldiers belonging to the different tribes at Athens, were not mixed together in an engagement, but were kept separate; an arrangement which appears from ch. 100. 1, to have been observed by the Syracusans also.) One tribe of the Athenian heavy-armed, with all their cavalry, charged and routed the Syracusan horse, killed some of them, and erected a trophy for this cavalry action.
The next day some of the Athenians were building the wall to the north of the central point, while others were collecting stones and timber, and laying them along the line, to the point called Trogilus; keeping in the direction in which their wall of circumvallation would be completed in the shortest distance from the great harbour to the sea.