At a production of the operetta
The White Horse Inn at the
London Coliseum, de Leon met Indian spiritual master Meher Baba. She would later describe the impact this meeting had on her, stating it was like "as if someone had taken a hammer and knocked me on the head... During that week I went about like one in a dream: I was stunned with the wonder of Baba, nothing else existed for me." She became a disciple of his and began a correspondence with him from 1931 until his death in 1969. During the early thirties, de Leon, along with dancer
Margaret Craske and Kitty Davy, became known as "The Frivolous Three" and "Kimco" due to their increasing involvement with Baba. In 1974, musician
Pete Townshend, a fellow Meher Baba follower, released a film titled
Delia, dedicated to de Leon and Baba. == Later life and death ==