Possible Codes and Ciphers in The Great US Treasure Hunt

[Jenny]

If the Great US Treasure Hunt moves forward.... let's learn about Codes and Ciphers which could be used....


David mentions the Polybius Square.... what is that?

mysteriouswritings.com/mws-codes-and-cipher-series-the-polybius-square-in-the-wizard-of-oz-armchair-treasure-hunt/

[Jenny]

And another way it can be used:

mysteriouswritings.com/mw-codes-and-ciphers-series-the-polybius-square-in-the-beacon-star-armchair-treasure-hunt/