Possible Clues:

• Poe title stowaway
• Poe title character
• English novelist Barbara
• Poe’s Arthur Gordon ___
• "Mr.___ Passes By" A.A. Milne
• Barbara who wrote 'Quartet in Autumn'
• Poe's "The Narrative of Arthur Gordon ___"
• "Mr. ___ Passes By" (A.A. Milne)
• "Mr.___ Passes By" (A.A. Milne)
• Poe character