Cecily Crozier was born in Australia, but spent fifteen years, from the age of ten, living in the south of France, London and Alexandria. Returning to Melbourne in 1938, she quickly mixed with the city's artistic community, perhaps helped by introductions from her uncle, artist Frank Crozier.
Cecily Crozier wrote very little but was enthusiastic about the arts and enjoyed mixing with artists and writers. She was determined to provide a place where Melbourne's avant garde could publish their works, and so founded the little magazine Comment. The first issue of Comment was published in September 1940. Due to war-time paper shortages, it was printed on whatever paper was available, giving the magazine a very avant garde appearance.
Despite its low circulation, Comment ran for another six years, promoting experimentation, and publishing the work of some of Australia's most prominent modernists of the 1940s, including Max Harris, Adrian Lawlor and Alister Kershaw. The work of the visiting Americans Karl Shapiro (who became a close friend) and Harry Roskolenko also appeared regularly in Comment, raising awareness of artistic developments in the United States. The international interests of the magazine also extended to European literature, supporting translations of Kafka, Baudelaire and Maupassant.
When Comment ceased operation in 1947, it marked the end of Cecily Crozier's contribution to Australian literature. According to Alister Kershaw, she subsequently devoted much of her time to the breeding of dachsunds.