Manly Palmer Hall (1901 1990) was a Canadian author which became sufficiently known and respected as a lecture and interpreter of the ancient writings.
This manuscript is one of the basic works in hermetism and alchemy. The manuscript contains the description of 26 alchemic leaves, as well as of ten retorts. The information in this manuscript is secret and it gives to the readers the opportunity to get the knowledge from the sanctum sanctorum of Alchemy.