Related Clues:

• Poplars seen in rocky pass
• Bellow recalling mad king
• Cleopatra's final solution, like afterthought
• Losing head, runs into snakes
• Final solution in Egypt as afterthought
• Eg, cottonmouths, boas
• Pass out, because of their venom?
• Legless reptiles
• Cleopatra's deliverers, like afterthought
• Cleopatra to Charmian: "Pass around the vipers"
• Poisonous creepers have power to infect animal
• Final solution in Egypt comes to an unusual pass
• Arsenic put with paraquat and strychnine, initially - poisonous things
• Animals born from fallen drops of Medusa's blood
• Snakes like Cleopatra's