Though she never practiced analysis herself, Fink became a respected friend and collaborator with Jung. In 1924-5 she worked on a fresh transcription of Jung's manuscript Liber Novus. Though she did not finish the transcription, she had ongoing discussions with Jung about its potential publication. She also transcribed and edited his 1925 seminar. In 1925 she met Jung's assistant Helton Godwin Baynes, known to friends as Peter, at the Jungian Conference at Swanage. They married in 1927, setting up home in Hemel Hempstead in England, though they moved to California in 1928. The pair collaborated on translating Jung into English, and in 1929 Cary also undertook the translation of Richard Wilhelm's translation of the I Ching.
