A British occult society contemporary with the Hermetic Order of the Golden Dawn, with rituals and initiations based on a mixture of Kabala and Christian mysticism.
Howe, Ellic. The Magicians of the Golden Dawn. London: Routledge & Kegan Paul, 1972.
King, Francis. Ritual Magic in England, 1887 to the Present Day. London: Neville Spearman, 1970.