The 39 Clues Wiki
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The 39 Clues Wiki

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KV 617 is a musical piece composed by Wolfgang Amadeus Mozart. To gain the Clue Tungsten in the book One False Note, Amy and Dan have to play this song on the harpsichord in Fidelio Racco's mansion in Venice, but add the note D above high C at the end. Because of the fact that the Tungsten was in the form of Japanese katanas, Amy and Dan went to Japan.

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