Possible Clues:

• One of the rivers of Hades
• Hades river over which souls of the dead were ferried by Charon
• One of the rivers of Hades over which the souls of the dead were ferried by Charon
• Girl's taken in by a swindle current in underworld
• In Greek mythology, one of the rivers of Hades
• Reach no dreadful, infernal river
• A revolutionary king on a river with a ferryman
• Preacher only covered one classical route to underworld