This fourth duo of supernatural detectives is of the feminine variety. Tim Prchal (Oklahoma State University) introduces these two women as early examples in the genre, and questions why there are so few female supernatural investigators in the early literature.
Shiela Crerar lost her home, so sets out to become a solver of "uncanny mysteries" and "layer of ghosts." She almost meets more than her match. Her six stories were published in 1920.
Luna Bartendale is a professional "supersensitive" who is called in to help end the curse of a bestial monster that haunts the lineage of an old family. This is the full novel, The Undying Monster, first published in 1922.