I’ve been browsing through an old notebook in which I kept notes about my Voynich studies lately. In June 2004 (boy, have we made progess since…!) I jotted down some ideas I had completely forgotten about by now:
“Apparently there are medieval ciphers where one vowel and the following letter are encoded with the same character: “a”/”b” -> <q>, “e”/”f” -> <r>, etc.
Of course, this would explain the occurence of triple glyphs.”
By “following” I meant “next in the alphabet.” Thus, the cipher would be basically a monoalphabetic subsitution cipher, but with “a” and “b” from the plaintext mapping to the same ciphertext character, “e” and “f” mapping to the same, etc.
Back then I devoted a bit of time and statistics to the issue, but aside of a suggestion of Italian as the plaintext language and a tentative mapping of EVA <e> to letters “i”/”l” (both “j” and “k” being uncommon at the time of creation of the VM, “l” would be the character following “i” in the alphabet), I didn’t get far.
Since 2004, I’ve moved away from simple substitution ciphers, because while the above scheme would indeed explain the occurence of three or more identical letters in a row, it fails to give an answer to the VM word grammar, why certain letter combinations are only ever found word-intitial or word-terminal, and other oddities.
Nevertheless, does one of my readers have more background where I may have come about this scheme?