In this 1910 work, Papus collects some of his previous writings concerning the multiple facets of French Masonry, and offers some new and insightful thoughts as well. He draws in part from the knowledge he received from such Masonic luminaries as John Yarker and W. W. Wescott. This work contains historical essays, mystical exegeses, Blue Lodge degree lectures, and much else of interest to the mystical Mason and Martinist.