Complex sentence: Charles Stansfeld Jones (1886-1950), aka Frater Achad, was an occultist and ceremonial magicianan early aspirant to A.A. (the 20th to be admitted as a Probationer, in December 1909) who "claimed" the grade of Magister Templi as a Neophyte.
Split into simpler sentences: Charles Stansfeld Jones (1886-1950), aka Frater Achad, was an occultist and ceremonial magician. An early aspirant to A.A. (the 20th to be admitted as a Probationer, in December 1909) who "claimed" the grade of Magister Templi as a Neophyte.