Is the VM inspired by late-antique and medieval riddle books?

[JustAnotherTheory]

Hi, even if it isn't thanks for the interesting links  

I would say that VM isn't monolithic. Different parts of it like herbal, astrological or balneological may have different insiprations.

If it contains some riddles then it went much better than expected because the manuscript itself is the biggest riddle  
And if it has riddles similar to those from your links then we cannot read them so we don't know.

I would be curious to see some illustrations too.

Basically the way I see it, is that since the VM often has a SINGLE theme on each page (i.e., a single illustration), this corresponds well with the medieval riddle hypothesis, as a single page could correspond to a single riddle.