I thought it was generally known by now that this technique was applied in 2014 to samples
of the Voynich MS.
I mentioned it in the Folger presentation, and I also mention it on my web site but perhaps
it is not that generally known, so a summary may be useful here.
Eraser crumb samples were taken from approximately 10 places in the MS, and on my
recommendation also from the cover. They were analysed early July 2014 by the team of
the University of York, primarily Matthew Collins and Sarah Fiddyment.
Protein is extracted from the MS pages, and matched with samples from known species.
The cover sample could not be matched to any species. For all folio samples the species was listed as 'cow'
(and yes, that is what the specialists use, when distinguishing from goat, sheep or deer).
I attach a copy of part of the related Email.