Hearne's first published work was the novel Voices under the Window, issued in 1955. Set in Jamaica in the late 1940s or early 1950s, it uses the framing device of a progressive politician's injury and death in a riot to narrate the story of a man who, born into racial and economic privilege, decided to cast his lot with the underprivileged. Hearne won the 1956 John Llewellyn Rhys Prize for Voices Under the Window, making him the first Caribbean author to win a major British literary prize.
