History of the Peloponnesian War

The Athenians, who had been deceived by their spies, and not imagining that the enemy's fleet could have gone by without their knowledge, and attended at leisure the assault of Eressos, when now they knew they were gone, immediately left Eressos and hasted to the defence of Hellespont.

By the way they took two galleys of the Peloponnesians that, having ventured into the main more boldly in following the enemy than the rest had done, chanced to light upon the fleet of the Athenians. The next day they came to Elaeus and stayed; and thither from Imbros came unto them those other galleys that had escaped from the enemy. Here they spent five days in preparation for a battle.

After this, they fought in this manner: The Athenians went by the shore, ordering their galleys one by one, towards Sestos. The Peloponnesians also, when they saw this, brought out their fleet against them from Abydos.

Being sure to fight, they drew out their fleets in length, the Athenians along the shore of Chersonnesus, beginning at Idacus and reaching as far as Arrhiana, threescore and six galleys; and the Peloponnesians, from Abydos to Dardanum, fourscore and six galleys.

In the right wing of the Peloponnesians were the Syracusians; in the other, Mindarus himself and those galleys that were nimblest. Amongst the Athenians, Thrasyllus had the left wing and Thrasybulus the right; and the rest of the commanders, every one the place assigned him.