And here is the filled out - but not decoded via codephrase - Dee Cipher. You'll immediately note that both the top and bottom contain an 'IO'. I've also highlighted the word 'Tunis' for reasons I'll explain some other time - though as an exercise to the reader you might want to connect St. Louis to Tunis in your spare time.
These are the simplest form of the Dee Cipher. The more common 37-1 form is a bit trickier in execution.
Edit: The 2/2 F should be P as it is in the post below.
These are the simplest form of the Dee Cipher. The more common 37-1 form is a bit trickier in execution.
Edit: The 2/2 F should be P as it is in the post below.
Last edited: