The Eight Books of Thucydides' History, translated by R. Crawley.
Twenty-first Year of the War—Recall of Alcibiades to Samos—Revolt of Euboea and Downfall of the Four Hundred—Battle of Cynossema
In the same summer, immediately after this, the Peloponnesians having refused to fight with their fleet united, through not thinking themselves a match for the enemy, and being at a loss where to look for money for such a number of ships, especially as Tissaphernes proved so bad a paymaster, sent off Clearchus, son of Ramphias, with forty ships to Pharnabazus, agreeably to the original instructions from Peloponnese; Pharnabazus inviting them and being prepared to furnish pay, and Byzantium besides sending offers to revolt to them. These Peloponnesian ships accordingly put out into the open sea, in order to escape the observation of the Athenians, and being overtaken by a storm, the majority with Clearchus got into Delos, and afterwards returned to Miletus, whence Clearchus proceeded by land to the Hellespont to take the command: ten, however, of their number, under the Megarian Helixus, made good their passage to the Hellespont, and effected the revolt of Byzantium. After this, the commanders at Samos were informed of it, and sent a squadron against them to guard the Hellespont; and an encounter took place before Byzantium between eight vessels on either side.
Reference address : https://www.ellopos.net/elpenor/greek-texts/ancient-greece/thucydides/history-8.asp?pg=47