Related Clues:

• With 25-Across, speaker of the quote hidden in 20-, 37- and 53-Across
• Groucho's real name
• Groucho, at birth
• Shakespeare play
• The Caesar stabbed by Brutus
• Play set in ancient Rome
• Shak. Roman play
• — Caesar
• The J of Dr. J
• Whom Marc orated about
• , 14 Roman dictator
• First name of Dr. No and Dr. J