While researching the balneology section, I noticed that some words were noticeably different from others on the same page, as if they had been added by someone else who knew Voynichese. Of course, this isn't exactly marginal, but I'm putting it here.
The word
kchedykary is written in a handwriting style similar to the rest of the section, but the lines are thin and about the same width, which is unusual for pen writing but resembles fountain pen writing. You can also notice that it is written above the line, rather than starting the line.
The letter
d is also highlighted - it is written without jerks and resembles an eight too much. On the same page, you can see the words between the pipe and the pond with the nymphs. They don't fit into the lines and are written in the same way as
kchedykary (clearly not with a pen).
Another example can be found on f75v.
The top words on You are not allowed to view links.
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Maybe You are not allowed to view links.
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and You are not allowed to view links.
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And, finally, You are not allowed to view links.
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Such "foreign signatures" are not regular, i.e., there are also signature words written with a pen in the section. However, these inscriptions have a special feature: as you can see, they are often written inside illustrations.
Maybe I'm wrong, and this is just a hallucination, but it seemed strange to me.
What do you think or know about it?