A Literary Halloween

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Across
  1. 2. Macbeth's eerie trio
  2. 6. a.k.a. Nosferatu
  3. 7. He haunts the opera
Down
  1. 1. Vampires really shine in this supernatural story
  2. 3. "Double double ____ and trouble"
  3. 4. Dr. Jekyll's alter ego
  4. 5. Poe's bird