No text, but a visual code

[Jorge_Stolfi]

I maintain that the Voynich is a perfect unity that was conceived as a unity of message.

Well, that is not my feeling at all.  Can we agree that, so far, there is no real evidence for either claim?  

In Voynich research, there is a lot of anachronism, such as separating astronomy and astrology when in the Middle Ages they were practically synonymous.

I agree that such was the case in the typical Medieval mind. But it was not necessarily the case for every medieval text.  I bet that there are many texts from the 1400s that describe purely "factual" astronomical concepts -- such as star catalogs or explanations of the Ptolemaic model for planet motions -- without much discussion of the supposed influence of stars and planets on Earthly affairs.  

The text in the VMS Zodiac pages seems to be too short for any significant discussion of the latter.  At best, the circular text on each page may say some generalities like "People born in this sign have good handwriting and make the best kings. It is the ideal month to harvest kiwifruit and invade a neighboring country to the North.  Beware of gift-bringing Greeks and of tricky math quiz questions.  Expect light drizzles and a comet or two."  I would think that an astrological treatise would say a lot more about casting horoscopes fortunes conjunctions quintiles satellitiums whatever etc.

All the best, --jorge