Possible Clues:

• John_____ , opponent of England's Charles 1
• British novelist Barbara
• ''Mr. ___ Passes By'' (A.A. Milne)
• Arthur Gordon, of whom Poe wrote
• British novelist Barbara __
• 16th century British statesman
• "Quartet in Autumn" English novelist Barbara
• Barbara ---, novelist; John ---, one of Charles I's 'Five Members'