W.H. Puzzle

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Across
  1. 2. Stone weapons were polished
  2. 4. Before something important
  3. 7. No permanent home
  4. 10. Dug up history
  5. 11. Has a lot of stairs
  6. 15. An advancement with permanent villages
  7. 17. Dog related
  8. 19. Something on a tablet
  9. 20. Law related
Down
  1. 1. Soil related
  2. 3. A little picture
  3. 5. Used weapons to hurt things
  4. 6. Trade related
  5. 8. Human related
  6. 9. Stones
  7. 12. History related
  8. 13. Early phase of something stone related
  9. 14. Something accepted by many in a group
  10. 16. Huge community
  11. 18. Copies something