The Dorabella Cipher (Part 3)

Today, only a very small update regarding the Dorabella cipher.


Below you see the timeline that contains the 4 points in time at which E. Elgar made use of his cipher symbols. I am aware of four points, if someone knows another different point and can tell what Elgar did with his symbols or what he wrote about them, please notify me about that.


Timeline:

1 - - - - - - - - - - 2 3 - - - - - - - - - - - - - - - - - - - - - - 4

1: 1885/86 - That is the Lisz-Fragment; the annotation he wrote on the side of some musical nodes [Figure 5,6, in Part 1].

2: 1896 - The Courage card set. He wrote his cipher symbols [Figure 3, in Part 2] on the first card of the set of nine cards on which he explained his solution of the Pall Mall Magazin cipher challenge.

3: 1897 - The Dorabella cipher [Figure 1, in Part 1].

4: 1920 - His notebook, that contains the example subsitutions [Figure 2, in Part 1].

Based on this timeline, one can see, that the timespan between $3$ and $4$ is $23$ years. Thus the cipher scheme approach written in his notebook could very well be some kind of effort to remind his old cipher system. The two events that are close in time are $2$ and $3$, that are the symbols from the Courage card set and the Dorabella cipher. Perhaps he used the idea of the challenge cipher (Nihilist cipher) in combination with his cipher symbols to construct the Dorabella cipher?

[The Dorabella Cipher (Part 4)]