Rosettes and Astrology

[ololololo]

For me it's rather simple.

I think this is plausible. The only issue is, history would have recorded such a miracle apothecary, with a strange magic book. Yet we have no such description of anyone.

This is quite easy, given that this document stands out from other quackish tricks. Well, and it could also be sold at a profit, so apparently that was another reason why VMS could be preserved.