The Daffodil Mystery is a 1920 thriller novel by the British writer Edgar Wallace. It features the detective Jack Tarling and his Chinese assistant Ling Chu.Clark p. 159
Adaptation It was adapted into a West German film The Devil's Daffodil (1961), part of a long-running series of Wallace adaptations made by Rialto Film.Goble p. 486
References
Bibliography Clark, Neil. Stranger than Fiction: The Life of Edgar Wallace, the Man Who Created King Kong. Stroud, UK: The History Press, 2015. Goble, Alan. The Complete Index to Literary Sources in Film. Walter de Gruyter, 1999.