This classic tome is considered by many to be the definitive analysis of one of the most mysterious and enigmatic, yet one of the most influential orders of esoteric Freemasonry. Le Forestier carefully examines the doctrine, rituals, and history of this theurgical order par excellence of the 18th century. This will be of particular interest not only to every student of Martinism, but also to the students of the early development of the so-called Scottish degrees in France.