Later Cleomenes' treacherous plot against Demaratus became known; he was seized with fear of the Spartans and secretly fled to +Thessaly [22.25,39.5] (region), Greece, Europe Thessaly. From there he came to +Arcadia [22.25,37.583] (department), Peloponnese, Greece, Europe Arcadia and stirred up disorder, uniting the Arcadians against Sparta [22.4417,37.0667] (Perseus) Sparta; among his methods of binding them by oath to follow him wherever he led was his zeal to bring the chief men of +Arcadia [22.25,37.583] (department), Peloponnese, Greece, Europe Arcadia to the city of Nonacris and make them swear by the water of the Styx.The “water of Styx” is a mountain torrent flowing through a desolate ravine on the N. face of Chelmos.

Near this city is said to be the Arcadian water of the Styx, and this is its nature: it is a stream of small appearance, dropping from a cliff into a pool; a wall of stones runs round the pool. Nonacris, where this spring rises, is a city of +Arcadia [22.25,37.583] (department), Peloponnese, Greece, Europe Arcadia near Pheneus.