Delayed Payment

''Delayed Payment'' by John Rhode (Miles Burton) is a 1950s mystery novel featuring Dr. Priestley, who helps investigators solve a complex "double puzzle" through his insightful, logical deduction. The story revolves around uncovering clues to a murder, with a focus on "how" the crime was committed rather than just "who". It is described as a, sometimes, less traditional puzzle plot for Rhode, as the culprit does not appear until late in the book.
The story involves Waghorn and a local constable uncovering evidence, culminating in a startling conclusion characteristic of the genre.