Robert Eustace was the pen name of Eustace Robert Barton (18541943), an eng doctor and author of mystery and crime fiction with a theme of scientific innovation. He also wrote as Eustace Robert Rawlings. Eustace often collaborated with other writers, producing a number of works with the author L. T. Meade and others.L. T. Meade was the pseudonym of Elizabeth Thomasina Meade Smith (18441914), a prolific writer of girls' stories. A Master of Mysteries is a collection of exciting classic mystery short stories. John Bell solves some of the most unusual mysteries, discovering the secrets of haunted houses and other occurrences of unknown entities...(Excerpt from Wikipedia)