The Alchemical Catechism: Now Available!
This short, sweet work is actually one of the better alchemical works I have edited, at least insofar as being easily understood in its explanations of topics within alchemy such as the inferred differentiation between the heating action of digestion (manure decomposing!), the anaerobic burn (a kiln) and open flame. It is in the form of questions and answers, and was first worked into this form by AE Waite, that madman of manuscripts himself.
Its interesting content regarding the generation of materia by the action of vapors within the Earth is a primitive forerunner to the modern understanding of volcanism and tectonics.