"Complete the crossword using the definitions. Once you finish, look at the circled letters to find your clue."

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Across
  1. 3. A valuable object hidden in a secret place.
  2. 5. A piece of information that helps solve a mystery.
Down
  1. 1. A book where you write your thoughts or discoveries.
  2. 2. An object used to unlock something.
  3. 4. Something that is kept hidden from others.