Dorothy Edwards was born in a small mining valley near Cardiff, the daughter of a teacher and a headmaster. She was educated at her father’s boy’s school, at Howell's School for Girls in Llandaff, and at the University of Cardiff. She became a talented linguist, and went abroad to study languages in Vienna and in Florence, Italy, before returning to live with her widowed mother in Cardiff, determined to make a living as a writer. She became politically active, working for socialist and Welsh nationalist causes, but writing in English. She also was a talented amateur singer. She published two books in her lifetime: a collection of short stories called Rhapsody (1927, which was extremely well-received by the critics both in the UK and the USA; and the novel Winter Sonata (1928).
She went to live in London, where she met David Garnett, who introduced her to the other members of the Bloomsbury Group. To this day, Dorothy Edwards remains a somewhat enigmatic figure. She returned to her home at Pen-y-Dre, Rhiwbina, in Cardiff, and burned her papers and letters before committing suicide by throwing herself under a train near Caerphilly.