f18v...Dioscorides...something about those leaves

[MarcoP]

There is also your study You are not allowed to view links. Register or Login to view., where the earlier examples are French and the more recent German.

Hi Koen, thank you for the further details. I personally see no clear sign of a geographical evolution in my post. Could you please explain what makes you think so exactly?

EDIT:

With all this evidence, I see little reason to doubt that the Zodiac images are based on something that originated in France, but had reached a German-speaking area by the time the VM used it.

I am still unclear about what the relevant evidence is. If I understand correctly, the idea is that there is a French Ur-Zodiac and that we can trace its evolution through time from the earliest example X to the Voynich manuscript. In my opinion, the evidence needed to evaluated the idea is:

• a list of the features that define zodiacs belonging to the family (features shared by X and the Voynich zodiac);
  
• earliest example X;
  
• other examples sharing those features, later than X and earlier (or not much later) than the Voynich manuscript.
  

Is the Soisson stained-glass zodiac the best candidate for X? It might be close to the right Cancer, but the window was heavily restored, so it does not appear to be 100% reliable.
I understand that this is off-topic, maybe it's better to move the last comments to a separate thread.