In 1922, Dion Fortune left Alpha et Omega claiming to be under Magical attack by Moina Mathers. This rift began when Fortune decided to form her own group, “The Fraternity of the Inner Light.” Mathers worried this would cause others to leave AeO. Mathers was also upset about Fortune revealing group secrets in the fictional stories she was writing. Mathers expelled Fortune for betraying the order.
Moina Mathers/Mina Bergson (1865-1928) was an English occultist and one of the founders of the Hermetic Order of the Golden Dawn. She was the Order’s first initiate. In 1890, she married another founder, Samuel Liddell MacGregor Mathers. They made a unique partnership: he would evoke spirits and she would envision his evocations clairvoyantly and then illustrate what she saw. When he died in 1918, Mathers became the Imperatrix of AeO. Mathers held this position until she died ten years later.