In a past number of this journal Mr. E. Harrison has raised an interesting problem in connexion with the Corinthian War. According to Diodorus, the fortress of Heracleia in Trachis passed out of the hands of Sparta into those of Thebes and her allies in the spring campaign of 394 B.C. Yet in the summer of that year the Spartan king Agesilaus made his way through the adjacent pass of Thermopylae without let or hindrance. Since it is hardly credible that the Thebans should have let Agesilaus through of set purpose, the question arises whether Diodorus can be right in asserting that Heracleia had already been lost to Sparta at the time of Agesilaus' passage.