Voynichese's letters

[ololololo]

My question is, is there a possibility that the cipher of the manuscript is based on numbers (in particular, Roman ones)?

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The structure of the Voynichese "words" and their length distribution of the lengths do suggest that the text is a codebook cypher, with numbers written in a Roman-like notation.

But I don't put much probability in that idea, because such ciphers are too hard to write and read.  

All the best, --stolfi

Yes, it's really difficult, but considering that the book was written by at least 3 people (these are only scribes, the whole "team" could be more), it seems possible. And maybe the encryption algorithm was simpler than we think.