Dee was indeed owner of the voynich manuscript, that would later be sold to rodolph, the bohemian alchemist king and athansius kircher, the best known decypherer of that age got his hands on it. Dee was the owner of europes largest private library until a crowd of people burned it for his occult activities. We may have lost a lot of treasures there.

There is a 17th century alchemist script in German that really clearly says that the philosophers stone is amanita muscaria, a stone that is not really a stone, white and red, within all of natures secrets will become attainable.