Deadly jobs

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Across
  1. 4. a child whose parents are dead
  2. 6. in need of sleep or rest
  3. 8. the money you earn when you work
  4. 9. age when children could start working
  5. 11. author of Oliver Twist
  6. 14. an artificial underground passage
  7. 17. opposite of bright
  8. 18. opposite of dry
  9. 19. a person who works in a mine
Down
  1. 1. fall down
  2. 2. a building where goods are manufactured or assembled by machine
  3. 3. what happens when you can't breathe well
  4. 5. a person who is the property of another and is forced to obey them
  5. 7. a combustible black rock
  6. 10. opposite of break (the law)
  7. 12. adjective that characterises the type of revolution that took place
  8. 13. gas produced by boiling water
  9. 15. with no clothes on
  10. 16. a vertical pipe which conducts smoke and combustion gases up from a fire