He can then read off, from the biliteral Diagram, the required Propositions.
A Proposition, containing two Letters, is said to be ‘biliteral’.
You have guessed by this time that the phrase “biliteral Cipher,” as it stands here, also contains a hidden word.
It is certainly empty: so we mark it as such on the biliteral Diagram.
The arrangement of the books was but another variant of our biliteral cipher.
Do you really think from what you have studied that the cipher is a biliteral one, or on the basis of a biliteral cipher?
It was your suggestion to reduce the terms of the biliteral; and it was by that means that I read the cipher.
Next, by the process described at p. 53, we transfer to a biliteral Diagram all the information we can.