The case with nine solutions

In Short

This classic procedural mystery follows the investigation of a suspicious death at a remote bungalow during a thick, isolating fog. When the Chief Constable and his local inspector arrive, they find themselves faced with a complex puzzle involving a series of potential, overlapping crimes. The narrative is defined by a rigorous, logical approach to detective work, as the investigators apply statistical and chemical reasoning to navigate a web of deception. It remains a hallmark of the "Golden Age" detective genre, prized for its analytical rigor and its focus on deductive methodology.

The Story

On a night shrouded in a paralyzing fog, Dr. Ringwood—an exhausted physician—stumbles upon a tragedy at a nearby bungalow, "Ivy Lodge." The discovery of a body sets in motion a high-stakes investigation led by the methodical Sir Clinton, a Chief Constable with a penchant for scientific precision, and his more impulsive subordinate, Inspector Flamborough. They quickly realize the crime is not a simple affair; it is a tangle of possibilities. Sir Clinton, in an effort to organize their thoughts, presents the "nine solutions"—a grid of permutations exploring whether the deaths of the individuals involved were the result of accident, suicide, or murder.

As the investigation progresses, the focus shifts to the personal and professional lives of those connected to the bungalow, including a local scientist named Dr. Silverdale and his associate, Dr. Markfield. Evidence appears in fragments: a torn, blood-stained laboratory coat, an oddly constructed cigarette holder featuring an embedded fly, and a series of cryptic, anonymous letters signed by "Mr. Justice." These clues are meticulously planted, intended to implicate Dr. Silverdale through a trail of incriminating circumstantial evidence.

The investigation reaches a fever pitch as the detectives realize they are being manipulated. A blackmailer named Whalley, who witnessed the initial events at the bungalow, complicates the narrative further by attempting to profit from his knowledge, only to be murdered himself. Sir Clinton eventually deduces that the entire structure of the investigation has been steered by the true culprit, who seeks to frame a rival. The climax occurs in a laboratory where the killer, Dr. Markfield, attempts to destroy his pursuers by orchestrating a chemical explosion. While the blast claims Markfield’s life, the detectives survive. The aftermath reveals that Markfield’s motive was a warped, possessive obsession with a woman named Yvonne Silverdale. His intellectual arrogance, intended to be his greatest asset, ultimately serves as his undoing as he underestimates the persistent, cold logic of Sir Clinton.

How It Unfolds

The discovery of the dead Dr. Ringwood encounters a scene of violence during a thick fog, forcing him to alert the authorities to a situation he initially tries to manage alone. Sir Clinton and Inspector Flamborough arrive at the scene to find evidence of a struggle and a missing person.

The nine possibilities Facing a vacuum of information, Sir Clinton maps out the logical permutations of the deaths, forcing the police to consider every combination of accident, suicide, and murder. This analytical framework guides the investigation through the early confusion.

The trail of planted evidence The discovery of a laboratory coat and a unique cigarette holder draws suspicion toward Dr. Silverdale. These items are found with such convenient timing that Sir Clinton begins to suspect they are intentional decoys.

The interference of Mr. Justice An anonymous informant sends cryptic coded advertisements to the police, claiming to be a seeker of justice. These letters serve to further entrench the suspicion against the intended scapegoat.

The confrontation of motives Sir Clinton realizes that the criminal is using his own intelligence as a weapon, creating a "double bluff." He forces a confrontation in the laboratory to test his theory about the nature of the chemical evidence.

The explosive conclusion The case culminates in a desperate act of sabotage when the killer triggers a volatile reaction during the police interrogation. The resulting explosion leaves the investigators to piece together the final fragments of the truth from the wreckage.

The People

Sir Clinton serves as the central analytical engine of the story. Cool, detached, and intellectually formidable, he views every crime as a mathematical problem to be solved through deduction and probability. He is the foil to the more conventional Inspector Flamborough, whose role is to provide the legwork while occasionally falling into the traps set by the murderer. Flamborough is a capable but human officer, prone to jumping to conclusions that Sir Clinton must correct.

Dr. Markfield, the antagonist, is a brilliant and cold-blooded scientist. His motivation is a singular, obsessive devotion to a woman, a passion that leads him to orchestrate an elaborate series of frames against his colleague, Dr. Silverdale. He is a man who treats murder as an experimental variable. Dr. Silverdale acts as the unfortunate focal point of the investigation, a man whose professional life and personal habits are twisted into evidence against him by Markfield’s machinations. The late Mr. Whalley, the blackmailer, represents the sordid reality of the world surrounding the crime, a man driven by greed whose interference makes him a necessary victim in the killer’s elaborate plan.

In Its Own Voice

"Deaths by violence fall under three heads, I think—accident, suicide, and homicide, including murder."

Sir Clinton explains his analytical framework to the Inspector, setting the stage for his systematic approach to the case.

"I'm not asking for your assistance now, Dr. Markfield... I want to know what Dr. Silverdale knows about the matter."

The Inspector exerts his authority in a tense interrogation, attempting to isolate the suspect from his influential colleague.

"Markfield, one has to admit, was too clever for us at the last."

Sir Clinton reflects on the final act of the tragedy, acknowledging the formidable nature of the man he was hunting.

What It's Really About

The book explores the tension between objective logic and the subjective nature of human malice. It argues that a crime is not merely a collection of physical evidence but a narrative constructed by the perpetrator to lead the observer astray. The core question is whether the human mind, when disciplined by scientific methodology, can pierce through a "double bluff"—a scenario where the criminal anticipates the detective's own processes. It presents the search for truth as an exercise in probability, suggesting that once the impossible is discarded, the remaining solution—no matter how strange—is the reality. It is a meditation on the arrogance of intelligence, showing how a brilliant mind can become so enamored with its own complexity that it loses sight of basic human morality.

Why Read It Today

Readers who enjoy a high-density, puzzle-oriented mystery will find this book deeply rewarding. It reads like a chess match, where the interest lies in the maneuvers of the mind rather than the pace of the action. It is a quintessential product of the late 1920s, reflecting a fascination with chemistry, forensic logic, and the orderly, if somewhat rigid, social dynamics of the era.

Modern readers should be prepared for the dense, expository prose that was common for the period; the narrative often pauses for long stretches of dialogue that function as lectures on logic or toxicology. There is a distinct, formal tone that may feel distant to those accustomed to contemporary pacing. The period attitudes—particularly regarding class, the role of domestic staff, and the casual treatment of medical ethics—are present, though they serve to anchor the story in its specific time. If you value a mystery that requires you to keep track of permutations, analyze chemical properties, and parse out the difference between a real clue and a manufactured one, this book offers a sharp, satisfying challenge. It lingers in the memory not for its emotional resonance, but for the chilling clinical precision of its villain and the unflinching competence of its hero.