Possible Clues:

• They're from the Hellenic capital
• In haste, an improper religious letter was sent to them
• Anna is the criminal living in Greece
• Foreign citizens for instance digesting note in The Scotsman?
• One side in the Peloponnesian War
• Inn has tea prepared for foreign guests perhaps
• Were these Marathon winners possibly Asian, then?
• Olympic entertainers running in heats, carrying a number
• Plato and Socrates