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Across
  1. 1. Maritime construction
  2. 3. Trade route
  3. 4. Early chemistry
  4. 6. Currency creation
  5. 8. Hygiene product
  6. 10. Ceramic creation
  7. 11. Early printing
  8. 13. Writing tool
  9. 15. Horse gear
  10. 17. Ancient beverage
  11. 19. Ancient computer
  12. 20. Explosive invention
  13. 22. Water clock
  14. 23. Siege engine
  15. 24. Harvest tool
  16. 25. Crossing structures
Down
  1. 2. Writing material
  2. 5. Ancient healing
  3. 7. Star observer
  4. 9. Adornment craft
  5. 12. Trade goods
  6. 14. Fragrant burner
  7. 16. Light source
  8. 18. Writing medium
  9. 21. Ancient cooling