| 11. | The Zodiac Killer sent four cryptograms to police while he was still active.
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| 12. | These letters included four cryptograms ( or ciphers ).
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| 13. | In later challenges the cryptograms become harder to break.
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| 14. | The game features extremely difficult puzzles, mostly cryptograms.
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| 15. | Prout declares he has no doubt of his ability to decode the cryptogram.
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| 16. | Most likely, " The Cryptogram " is headed for New York.
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| 17. | It was, Is there a cryptogram there?
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| 18. | The two texts were much like complex versions of today's newspaper cryptograms.
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| 19. | It also helped popularize cryptograms and secret writing.
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| 20. | The cryptogram on the cover equates to " fingerbang Guttermouth piece of shit ."
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