A lifelong bachelor, Dr Trollope lived in a fine house on Long Acre, London WC2, a short walk from his offices in Bloomsbury.

The Roby family's physician (in addition too many well-off London families) for almost 30 years, Trollope was well-groomed and well-dressed and held a fine collection of objets d'art.

As one of the three men who committed Alexander Roby, and the middle man between Grahame Roby family and Doctor Charles Highsmith, Trollope's views on the Roby case were of great interest to Bartlett, when the two men met in Long Acre on the 1st November 1928.

Trollope described the circumstances of the Roby Murders and expressed the opinion that Alexander was unfit for release However, when pressed this opinion seemed to be based on his general belief that asylum inmates should never be released, rather than anything directly related to Alexander.

On the evening of November 3rd 1928, Dr Trollope was murdered in St James' Park. A report of the murder appeared in the next day's Daily Express.

On November 4th, Dr Bartlett received a letter (Page 1, Page 2), written by Trollope on the day of his death, revealing more facts about Roby, and also describing a vision in which Trollope accurately predicted the exact circumstances of his own death.

The party discovered that Trollope was murdered by Michael Coombes, who they first knew as simply The Tall Man.