Li’s Crossword Puzzle to Koka.

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Across
  1. 1. A type of tree with needle-like leaves (6)
  2. 3. A collection of maps (5)
  3. 5. Bone in the lower leg (5)
  4. 7. Capital of Latvia (4)
  5. 9. A long, adventurous journey (5)
  6. 11. HOLMES Famous detective created by Arthur Conan Doyle (6,7)
  7. 13. Shakespearean king with three daughters (4)
  8. 15. Ancient stringed instrument (4)
  9. 17. The capital of Norway (4)
  10. 18. The process of decay in organic matter (9)
  11. 20. Opposite of zenith (7)
  12. 21. A type of cloud often associated with thunderstorms (10)
Down
  1. 2. Study of word origins (8)
  2. 4. A place where bees are kept (5)
  3. 6. The longest bone in the human body (6)
  4. 8. Greek hero of the Trojan War, vulnerable at his heel (7)
  5. 10. Type of triangle with no equal sides (9)
  6. 12. Constellation also known as "The Hunter" (5)
  7. 14. A deep chasm or void (6)
  8. 16. Mythical bird that rises from ashes (7)
  9. 17. Large flightless bird native to Africa (6)
  10. 19. Unit of electrical resistance (3)