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Cryptic Ciphers and Signal Relays is a hard crossword puzzle with 18 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Cryptic Ciphers and Signal Relays
Challenging puzzle for experienced crossword solvers
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Across
  • 1. Ancient symbolic representations carved or painted for communication
  • 2. Ancient fire-based signalling technique or device
  • 3. Flaming signal source often used in clandestine night messages
  • 4. Water-based message device, from Greek for 'water writer'
  • 7. Notched wooden device for keeping accounts and coded records
  • 12. One who transports messages, whether human, bird, or device
  • 13. Decoding tool essential for secret communication
  • 14. Ancient reed-based manuscript medium from Nile delta
Down
  • 5. Nomadic culture known for early communication via horse riders
  • 6. Sea snail genus mined for purple dye used in royal scrolls
  • 8. Reed pen used in antiquity for writing messages
  • 9. Ancient optical signaling using reflected sunlight
  • 10. Elaborate writing art on ancient manuscript rolls
  • 11. Visual signalling using arms or flags in coded form
  • 15. Ancient tunnel system used to transport secret missives or water
  • 16. African method of long-distance coded percussion
  • 17. Tall stone monument often inscribed with historical decrees
  • 18. Place to house birds used for ancient correspondence
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