Robert Eustace was the pen name of Eustace Robert Barton (1871–1943), an English 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 (the pseudonym of an early feminist Elizabeth Thomasina Meade Smith) and others. He is credited as co-author with Dorothy L. Sayers of the novel The Documents in the Case, for which he supplied the main plot idea and supporting medical and scientific details.
Barton was the son of Alfred Bowyer Barton, FRCS, and Editha Helen Howell, of The Green, Hampton Court. He was educated at Barham House, Hastings. He first appeared in the Medical Register in 1897. He qualified MRCS. He served in the Royal Army Medical Corps (Temporary Captain) and was awarded the Serbian Order of St. Sava, 5th class. He was working in the County Mental Hospital, Gloucester, in 1932. He died in 1943.
Despite a career in crime fiction spanning more than forty years, Robert Eustace was the most mysterious member of the Detection Club. For decades after his death, students of the genre speculated about his identity, his death of birth, and even his sexual orientation. One wild theory suggested he was married to Sayers. In fact, he was born in 1871, his real name was Robert Eustace Barton, and he was a doctor working a a mental hospital in Northampton. (Martin Edwards, The Golden Age of Murder. Harper Collins Publishers, 2015. pp. 123 – 124)
Sayers and Eustace never wrote together again. Eustace was left to resume his infrequent collaboration with Edgar Jepson, who owed his place among the founder members of the Detection Club more to his clubbability than to his detective fiction, of which only a locked room mystery, “The Tea Leaf”, a Golden Age Classic that Eustace co-wrote with Edgar Jepson, has stood the test of time.
“The Tea Leaf”, Eustace’s late (1925) collaboration with Edgar Jepson, finds him pursuing many of the same themes, some 20 years after his collaboration with Meade ended. There is the same interest in freezing, the same impossible crimes explained through chemistry, the same interest in the geometry of rooms and buildings, the same obsessive characters, and the same brilliant female scientists: here one serves as the detective. The plot of this story has been re-used and summarized so many times it has passed into the folklore of the detective story, so this tale has lost some of the punch it must have originally had. But it is still a very well done story.
Meade and Eustace wrote six stories about sleuth John Bell, collected in 1898 in A Master of Mysteries, and soon after a seventh and very fine tale “The Secret of Emu Plain” about the same detective. Bell is a well-to-do man who uses science to explain and expose phony supernatural events. A Master of Mysteries has been called the first collection of impossible crime tales. Like many alleged “firsts” in mystery history, this claim is hard to prove or disprove. It is certainly the earliest impossible crime collection known to me, or mentioned in standard reference works. This landmark status can lead to inflated expectations. The stories in A Master of Mysteries are pretty mild, and often mediocre. The explanation of all the impossibilities centers on technological devices or scientific situations. The stories thus are part of both the impossible crime and Scientific Detection traditions. (Mike Grost L.T. Meade and Robert Eustace)
(Source: Facsimile Dust Jackets LLC. Ernest Benn Limited (UK), 1930)
The Documents in the Case is a 1930 novel by Dorothy L. Sayers and Robert Eustace. It is the only one of Sayers’s twelve major crime novels not to feature Lord Peter Wimsey, her most famous detective character.
Book Description: The bed was broken and tilted grotesquely sideways. Harrison was sprawled over in a huddle of soiled blankets. His mouth was twisted . . .
Harrison had been an expert on deadly mushrooms. How was it then that he had eaten a large quantity of death-dealing muscarine? Was it an accident? Suicide? Or murder?
The documents in the case seemed to be a simple collection of love notes and letters home. But they concealed a clue to the brilliant murderer who baffled the best minds in London. (Source: Hodder & Stoughton)