Mnišovský's report

[LisaFaginDavis]

That sounds cool - is this photo available somewhere? Or do we only know it from a description?

Maybe it's this one?

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(Edit: ) The blog post that references the image: You are not allowed to view links. Register or Login to view.

Yes, that's the photo that was taken before the reagent was applied. It's in MS 408 Box E, one of the emphemera boxes that accompanies the manuscript at Yale. I reproduced it here as well: 
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In this case, Voynich's story really does add up - that while processing images, he noticed something in the lower margin of f. 1r and did what anyone at that time would have done: applied a chemical reagent to the parchment to try and discern faded or scraped text. Many manuscripts were similarly damaged in the 19th and early 20th centuries. No one knew that the reagent would eventually lead to permanent staining. 

It is extraordinarily unlikely that Voynich added the faded marginalia on f. 1r - the Tepenec signature and the alphabets in the right-hand margin I've identified as Marci's handwriting. The sequence of events that would have had to have happened for this to be Voynich's own work really strain credulity. How could he possibly have know that technology would exist a hundred years later that would make these erased notes legible? Why wouldn't he have used the handwriting of Marci's secretary, who wrote the Marci letter that accompanies the manuscript, instead of Marci's own hand? He wouldn't have known that the letter wasn't written by Marci but by his secretary. The argument that Voynich wrote these himself a requires several increasingly implausible steps. The most likely scenario is that Tepenec and Marci themselves actually made these additions to the manuscript.