She was born Doris Morley Fletcher in 1894 in
Marylebone, London, to Arthur Morley Fletcher. She studied architecture at the
School of Architecture of the
University of Cambridge, probably under
George Checkley. In 1916, she married the engineer, Charles Richard (Dick) Garrod Cosens (1893–1956). At that date, he was in the
Royal Engineers; after the First World War, he studied at
King's College, Cambridge, and later became a lecturer in engineering at the University of Cambridge. During her married life, Cosens lived in Cambridge, latterly at 13 Millington Road. She was in practice as an architect in the town and additionally gave her profession as an art critic. Her reviews of books and exhibitions were published in the ''
Architects' Journal''; the architectural scholar
Alan Powers comments that these reveal her to have been "well informed and critical about contemporary developments". Albert Hill describes her as an "energetic advocate of the Modern style". Her career as an architect was limited by two world wars, the demands of married life and her early death. She died unexpectedly in Cambridge on 5 October 1945, aged 52. Her funeral was held at Cambridge Crematorium. ==Works==