Find the surnames of these literary Elizabeths (remember they may have shortened their first names!)

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Across
  1. 6. Writer of the Cazalet Chronicles
  2. 7. Victor Frankenstein's adopted sister (and his wife)
  3. 8. Victorian poet
  4. 10. Her name isn't Lucy Barton
  5. 11. A novelist who shares her name with an actress
  6. 12. One of Britain's most famous cookery writers
Down
  1. 1. Her mother is Clarissa
  2. 2. She ate, prayed and loved
  3. 3. David Copperfield's great aunt
  4. 4. Played on screen by Keira Knightley
  5. 5. She wrote the first biography of Charlotte Brontë
  6. 9. The third of four sisters