The History of the Grecian War (1.53.4-1.54.2)

But the Athenians made answer thus: Men of Peloponnesus, neither do we begin the war nor break the peace; but we bring aid to these our confederates, the Corcyraeans; if you please therefore to go any whither else, we hinder you not, but if against Corcyra, or any place belonging unto it, we will not suffer you.

When the Athenians had given them this answer, the Corinthians made ready to go home and set up a trophy in Sybota of the continent. And the Corcyraeans also both took up the wreck and bodies of the dead which, carried every way by the waves and the winds that arose the night before, came driving to their hands, and, as if they had had the victory, set up a trophy likewise in Sybota the island. The victory was thus challenged on both sides upon these grounds.

The Corinthians did set up a trophy because in the battle they had the better all day, having gotten more of the wreck and dead bodies than the other and taken no less than a thousand prisoners and sunk about seventy of the enemies' galleys. And the Corcyraeans set up a trophy because they had sunk thirty galleys of the Corinthians and had, after the arrival of the Athenians, recovered the wreck and dead bodies that drove to them by reason of the wind; and because the day before, upon sight of the Athenians, the Corinthians had rowed astern and went away from them; and lastly, for that when they went to Sybota, the Corinthians came not out to encounter them. Thus each side claimed victory.