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."