Samuel Liddell ( or Liddel ) MacGregor Mathers ( 8 or 11 January 1854 -- 5 or 20 November 1918 ) , born Samuel Liddell Mathers , was a British occultist .
Samuel Liddell ( or Liddel ) `` MacGregor '' Mathers , born as Samuel Liddell ( January 8 or 11 , 1854 -- November 5 or 20 , 1918 ) , was one of the most influential figures in modern Occultism .