On retirement from the British Colonial Service, Gardner moved to London but then before World War II moved to Highcliffe, east of Bournemouth and near the New Forest on the south coast of England. After attending a performance staged by the Rosicrucian Order Crotona Fellowship, he reports meeting a group of people who had preserved their historic occult practices. They recognised him as being "one of them" and convinced him to be initiated. It was only halfway through the initiation, he says, that it dawned on him what kind of group it was, and that witchcraft was still being practised in England.