After the death of her son in 1917 and her husband in 1922, Rhys Davids turned to Spiritualism. She became particularly involved in various forms of psychic communication with the dead, first attempting to reach her dead son through seances and then through automatic writing. She later claimed to have developed clairaudience, as well as the ability to pass into the next world when dreaming. She kept extensive notebooks of automatic writing, along with notes on the afterlife and diaries detailing her experiences. These notes form part of her archive jointly held by the University of Cambridge and the University of London.