Possible Clues:

• Card rules expert
• English astronomer who rejected the 'Big Bang' theory of the origins of the universe, d. 2001
• Edmond who wrote many treatises on the rules of games
• Edmond —, early writer on card games
• Olive eaten by male astrophysicist
• Big name in game rules
• See expression of surprise after sending back games expert
• Surname on rule books
• Authority in card games
• Rulebook compiler