1920, Case and Michael Whitty collaborated in the development of the text which would later be published as The Book of Tokens. This book was written as a received text, whether through meditation, automatic writing, or some other means. It later surfaced that Master R. was the source. On May 16, 1920, Case was initiated into Alpha et Omega's Second Order. Three weeks later, according to the Hermetic Order of the Golden Dawn's bio-page on Case, he was named Third Adept. In December 1920, Michael Whitty died. Case believed Whitty's health problems were attributable to the dangers that arise or may arise in the practice of Enochian magic. He later corresponded with Israel Regardie about those concerns. Controversy with Moina Mathers Like his fellow British occultist and later correspondent, Dion Fortune, Case found himself in a controversy with Moina Mathers (1865-1928) in the early 1920s. Perhaps because of his quick advancement through the grades of the order, Case sparked some jealousy among the other adepts. Moreover, others may have thought some of his teachings inappropriate. On July 18, 1921, Mathers wrote Case regarding complaints she had received regarding some of his teachings. Apparently, Case had begun discussing the topics of sexual symbolism and sex magic, which at the time had no official place in the order's curriculum. Since no knowledge lectures exist on the subject, whether sex practices were ever taught in the Golden Dawn has been a long-standing question. In her correspondence with Case, Moina wrote, "I have seen the results of this superficial sex teaching in several occult societies as well as in individual cases. I have never met with one happy result". But to Case, sexuality became an increasingly important subject. In his Book of Tokens, a collection of inspired meditations on the 22 Tarot Keys of the Major Arcana, Case comments on the sex function, "You must wholly alter your conception of sex in order to comprehend the Ancient Wisdom. It is the interior nervous organism, not the external organs, that is always meant in phallic symbolism, and the force that works through these interior centers is the Great Magical Agent, the divine serpent fire." In his works, The True and Invisible Rosicrucian Order and The Masonic Letter G, he writes of certain practices involving the redirection of the sexual force to the higher centers of the brain where experience of supersensory states of consciousness becomes