Before and After / Backward and Forward

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Across
  1. 3. the backside
  2. 8. the introductory part of a story
  3. 12. to warn beforehand
  4. 13. an introduction
  5. 14. looking back on the past or past events
  6. 15. having an effect on things in the past
  7. 16. the first performance
  8. 17. after someone's death
  9. 18. looking back on the past
  10. 19. happening before the natural time
Down
  1. 1. to predict
  2. 2. care taken beforehand
  3. 3. to come forward and declare publicly
  4. 4. to put off doing something until later
  5. 5. to put off until a later time
  6. 6. move backward, especially to a worse state
  7. 7. the highest point of land projecting out over water or land
  8. 9. a prediction
  9. 10. to ignite a retrorocket
  10. 11. a natural inclination toward