Based on the dictionary he used in the research I came up with more alchemy symbols in the illustrations of the VMS.
Among the most famous alchemists of the time the VMS vellum was carbon dated was Barbara
of Cilli (Barbora Celská) - the wife of Sigismund, Holy Roman Emperor. After the death of Sigismund
she was exiled to Poland and in 1441, she moved to Melnik in Bohemia. Barbora spent her last years
pursuing her interests in alchemy and the occult.
She was very politically and socially active (she even participated in plots against her own husband).
The queen also meddled in the creation of the Order of the Dragon.
Barbara (or Barbora) is riding a horse and waving starry banner in Konrad Kyeser’s Bellifortis manuscript.
The reason I am bringing up Barbora of Celje is because the author of the Voynich Manuscript seems to be well connected inside the Hungarian and the Austrian courts according to my 'geopolitical' theory of the VMS's 'astronomical' pages (here).