Introduction: 

".....  It should be made clear at the beginning  that this Readers' Guide is not intended as a commentary on the subject matter contained in the Letters but only as a basic guide to assist the students in understanding references which might otherwise prove confusing or distracting. Therefore, no attempt is made to discuss metaphysical, philosophical, or occult subjects;the material is limited primarily  to a narrative of events, brief explanations of historical incidents, definitions, biographical information and descriptive material. Included also are a great many cross-references both within the book itself and to other books or published material directly related to the subject matter.The Guide is arranged in four major categories:1. CHRONOLOGY  2. STUDY NOTES  3. ALPHABETICAL NOTES                4. APPENDICES. ..."