Measuring Long-Range Structure in the Voynich Manuscript

[nablator]

Importantly, the Naibbe cipher proceeds with encryption randomly on a letter-by-letter basis. The natural question: Is it possible at all to construct a homophonic substitution cipher where long-range correlations in the sequence of homophone selections induce long-range correlations in the ciphertext?

I tried a gradual cumulative change of the text, one additional letter of the alphabet rotated every 100 lines.

At the end of the Latin text (Marbodius carmina varia, nearly 1000 lines) 10 letters are rotated:

pmne manufactum cpntumit lpnga vetuttat
ruie cautut caveat aliena exempla epcebunt
jaue ullum temput vanitat timulata manebit
cpneit fescla famet plenit intuavia cuncta
epctsina ett fsuctut eulcit saeicit amasa

   

I tried incrementing the rotation of all letters every 5 or 10 or 50 or 100 lines a few days ago and it didn't work at all (no gap) so I concluded that something more gradual is needed, now only one letter's rotation is incremented every 100 lines. 100 lines is about right, the gap gets bigger when the number of lines between each rotation increment is decreased.

I suppose rotating one table (resulting in a different choice among several possibilities with different frequencies) or switching two or more elements of a mapping table (the entire list of homophones maybe for two plaintext chunks) once every 50 or 100 lines in a deterministic way to make the cipher reversible will have a similar effect on the Naibbe ciphertext.