Etymology of Wicca learned the term during his initiation into the New Forest coven in 1939. By the late 1950s, Gardner's rival Charles Cardell, founder of his own tradition, had begun referring to the religion's followers as "Wiccens", and possibly used "Wicca" in reference to the religion itself. The inclusive use of the term "Wicca"—referring to the entirety of Pagan Witchcraft religion—has been traced to Britain in the early 1960s, when it was used by various groups and publicised through use in adverts, magazines, and other literary sources. It was later adopted by figures like Alex Sanders and Gavin and Yvonne Frost, who
Church and School of Wicca wife Yvonne was an American with a background in Spiritualism. He then claimed to have been initiated into a Wiccan group in St. Louis, Missouri. When living in St. Louis they developed a correspondence course through which to teach others about Wicca, advertising these courses as the "School of Wicca". They argued that by spreading their religious teaching in the form of a correspondence course, they were reaching a wider range of people than initiatory-based forms of Wicca, and that this would be necessary in order for the religion to become a "strong religious force". They believed strongly that Wicca