I think it right to warn my reader, that there are more passages than one in the book, which are of that nature, which will be perfectly understood by my Masonic friends, but which my engagements prevent me explaining to the world at large. My Masonic friends will find their craft very often referred to. I believe, however that they will not find any of their secrets betrayed; but I trust they will find it proved, that their art is the remains of a very fine ancient system, or, perhaps, more properly, a branch of the fine and beautiful system of WISDOM which, in this work, I have developed.