Museum teaser

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Across
  1. 3. 3D stone-triangles, to a point
  2. 5. The Romans found her revolting
  3. 7. Do you measure with this Egyptian ruler?
  4. 9. He lorded it over Howard
  5. 13. Churning milk makes it angry
  6. 14. Made a right old mess of it, in the centre of town?
  7. 16. Every picture tells a story in ancient Egypt
  8. 17. Said twice is a humorous way to disapprove!
  9. 18. A senior Navy officer who smokes and drinks
  10. 19. He turned a blind eye for this clue
Down
  1. 1. The dreamer in the town
  2. 2. Sounds like a cyclist hawking goods
  3. 3. Papering an old document
  4. 4. This little piggy went there, in Swaffham
  5. 6. He wasn't after a medal, but he went for gold
  6. 8. 'Hamwaffles?'Remove the French and you have a town in Norfolk
  7. 9. She may be corny, but she's a goddess
  8. 10. Nothing to do with the football club, this tribe of Celtic fanaticals
  9. 11. Gus a rash cop got tangled up in the Egyptian coffin
  10. 12. All wrapped up because she had children
  11. 15. Sounds amusing, but it's full of old stuff