Possible Clues:

• Author making appearance in West End hall
• French writer, 1783-1842, whose original name was Marie-Henri Beyle
• 'The Charterhouse of Parma' novelist
• French author of 'Le Rouge et le Noir'
• Writer in Belgian port, not O Henry
• French novelist admired by Zola
• Pen name of Marie-Henri Beyle, author of 'Le Rouge et le Noir'
• Pen name of Marie-Henri Beyle, 1783-1842, French novelist
• Pseudonym of French 19th-century novelist Marie Henri Beyle
• ''Le Rouge et le Noir'' author