The Apartment Fire
The Mystery of The Invisible DogThe fire appears to make John Murphy a victim, but the details of his habits and hospital stay turn the emergency into a suspicious alibi.
increasing
Bearing strength in each event
decreasing
A Familiar Ashtray

A Familiar Ashtray
A claim of caution
John Murphy boasts that his special ashtray will prevent a cigarette from falling out. He presents himself as careful despite his smoking.
A remembered contradiction
The boys and Jupiter Jones retain the detail. When a fire later starts in Murphy’s apartment, his own claim becomes a test of the accidental explanation.
Smoke in the Windows

Smoke in the Windows
A rapid response
Flames burn behind Murphy’s curtains, and Sonny Elmquist breaks a window. The boys use a fire extinguisher and pull the unconscious stockbroker into fresh air.
A narrow escape
Murphy survives smoke inhalation. The immediate urgency makes it easy to accept the fire as accident, but Jupiter Jones notices inconsistencies.
The Cigarette Explanation

The Cigarette Explanation
An ordinary cause
The fire captain says a cigarette fell into the sofa and smoldered. Murphy is taken to hospital, apparently because he fell asleep while smoking.
Doubt survives
Jupiter Jones recalls Murphy’s special ashtray and questions why the man was found heading toward the bedroom. The official story does not settle the matter.
The Private Clinic

The Private Clinic
A patient’s refuge
Murphy is transferred to Belvedere Medical Clinic for observation. The quiet hospital setting seems to remove him from danger and from the apartment building.
A possible alibi
Jupiter Jones recognizes that the clinic may also protect a culprit from suspicion. A believable medical stay can conceal movement if staff are not watching closely.
The Fire Reinterpreted

The Fire Reinterpreted
A staged event
Jupiter Jones concludes that Murphy set the fire to enter hospital and create a convincing alibi. The rescue that made him seem like a victim had served his plan.
A pattern confirmed
The fire joins the poisoning and car explosion as part of Murphy’s effort to clear witnesses. The apparent accident becomes evidence of deliberate manipulation.
The evening before the fire
Late morning after the car explosion
Minutes after the rescue
The afternoon following the fire
During the final arrest