Simplify the following text for a Grade 6 native English-speaking person.
Original: During his time , there were a few other people who wrote on the subject , including Charles Stansfeld Jones and J.F.C. Fuller .
Simplified: During his time , there were several who wrote on the subject , including U.S. O.T.O. Grand Master Charles Stansfeld Jones , whose works on Qabalah are still in print , and Major-General J.F.C. Fuller .