Possible Clues:

• Giant tusk holders
• Big beasts dropping a subject with rounds in it
• Elephants' extinct kin
• A thousand winged creatures seen around in the morning — they are huge
• Extinct large hairy animals
• Male American fliers in ancient jumbos
• Extinct animals, similar to elephants
• Mania on vacation: '1,000 insects! Enormous creatures!'
• Elephant relatives of long ago
• A couple of Frenchmen taken in by local Irish girlfriends - the beastly sorts who have long since gone