Historical ciphers, when they were introduced and their effect

[Rafal]

And I'd like to add one thing. All these ciphers are not similar at all to Voynich Manuscript. The most similar way I can think of would be just coding letters as Roman numerals.

Actually I have seen such cipher, most probably older than Voynich Manuscript.
I don't remember where I have found it but have a look:

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