Here is my morning thought...
Since there are four alphabetical strings, Cipher 1 is divided in 5 sections.
Could this mean the Cipher 1 document has 5 sections?
Could the number of letters in the string indicate how far to number ina a section before continuing the numbering in the next section?
I studied this yesterday and concluded Cipher 1 was not created using multiple documents. Here's why...
There are 5 sections. If the cipher numbers used within and between each section are all different, then TB could have used one key for all 5 sections; however, the same cipher numbers DID appear in other sections.
For example...18 appears in sections 1, 2 and 4.
If multiple documents are used, 18 would represent 3 different letters thus requiring different keys or subcipher keys.
If Robert Morriss had received the keys from St louis, he would not be guessing or trying to apply the Cipher 2 key to Cipher 1, so he would be completely unaware that the alphabetical strings even existed in Cipher 1.
So how would he know when to stop using Subcipher 1 key and start using Subcipher 2 key. Likewise, when to stop 2 and start 3, etc.
TB would have had to provide additional instructions to RM so he would know where to switch Subcipher keys. He could do this by saying...use Subcipher 1 key until you see cipher pattern 1 and use Subcipher 2 key at the end of the pattern untilyou see cipherpattern2, etc. So instructions could have been conveyed to but does complicate RM's decoding job.
If you agree that TB took the necessary steps to protect ciphers from being the reverse engineered yet wanted to make it easy for RM to decode the ciphers 10 years later when the key from St louis arrived, then TB would not used the same cipher numbers between the 5 sections in the first place. And certainly would not have used 5 different subcipher keys.
