Twelve Keys: Illustrated Alchemical book

"I, Basil Valentine, brother of the Benedictine Order, do testify that I have written this little book, wherein, after the manner of the Ancients, I have philosophically indicated how this most rare treasure may be acquired, whereby the true Sages did prolong life unto its furthest limit. "

The Twelve Keys is a widely reproduced alchemical book attributed to Basil Valentine, a Benedictine monk who for his achievements in the chemical sphere has been given the title of Father of Modern Chemis...