Input (grade 8): During his time, there were several who wrote on the subject, including US O.T.O. Grand Master Charles Stansfeld Jones, whose works on Qabalah are still in print, and Major-General J.F.C. Fuller.
Output (grade 8): During his time, there were a few other people who wrote on the subject, including Charles Stansfeld Jones and J.F.C. Fuller.