Related Clues:

• Hint
• Prompt
• Nudge
• Memento
• Souvenir, e.g.
• Memory jogger
• Note on the fridge, maybe
• String around your finger, e.g.
• Souvenir
• Post-it Note, perhaps
• Note to self
• Memory aid
• String around a finger
• Aide-mémoire
• If this refers to one who looks after the elephant, he ought not to have to provide this