"The Yellow Poppy" (1920), about the adventures of an aristocratic couple during the French Revolution, was later adapted by Broster and W. Edward Stirling for the London stage in 1922. She produced her bestseller about Scottish history, "The Flight of the Heron", in 1925. Broster stated she had consulted eighty reference books before beginning the novel. She followed it up with two successful sequels, "The Gleam in the North" and "The Dark Mile". She wrote several other historical novels, much reprinted in their day, although this Jacobite trilogy, inspired by a five-week visit to friends in Scotland and featuring the dashing Ewen Cameron as hero, remains the best known.