Henry’s Addiction and Death
Why Didn't They Ask EvansHenry’s dependence on morphia isolates him from his family and gives Roger a means to arrange his murder as an apparent suicide.
increasing
Bearing strength in each event
decreasing
A Change in Character

A Change in Character
Sleeplessness and dependence
Roger tells Frankie that Henry began taking drugs after complaining of sleeplessness. Henry’s changing moods and pin-point pupils make the addiction visible to Roger and later to Frankie.
A secret in the household
Henry withdraws into his study and shifts between agitation and unnatural brilliance. His dependence alters the atmosphere at Merroway Court while his wife remains unaware of its cause.
The Drug Supply

The Drug Supply
A suspected pipeline
Roger believes that morphia reaches Henry by post and that Henry becomes especially irritable when a supply is delayed. He wonders whether Dr Jasper Nicholson could arrange a cure.
Vulnerability created
The drug makes Henry susceptible to promises of treatment and to pressure from those who control access to it. The apparent medical problem becomes a mechanism through which Roger can direct his brother’s choices.
Sylvia Learns the Truth

Sylvia Learns the Truth
A devastating revelation
Dr Jasper Nicholson tells Sylvia that Henry is addicted to morphia. She goes straight to her husband, who breaks down and agrees to seek treatment.
Treatment becomes a danger
Sylvia insists that Henry go to The Grange, despite Roger and Frankie’s objections. Her trust in Nicholson inadvertently advances the plan Roger has prepared.
The Shot in the Study

The Shot in the Study
Murder beneath a noise
While the aeroplane drowns the sound, Roger enters Henry’s study and shoots him. He writes a farewell note, manipulates the revolver, and arranges the locked-room appearance of suicide.
An official fiction
The inquest returns suicide while of unsound mind, sparing the family a public contest. The truth remains concealed because Roger has prepared both the physical scene and a convincing witness narrative.
A Brother’s Betrayal

A Brother’s Betrayal
Care used as cover
Roger had presented himself as a concerned brother while helping Henry become dependent on morphia. His proposed treatment at The Grange would have placed Henry where the conspiracy could finish him privately.
The relationship redefined
Roger admits that he killed Henry when events threatened to expose the plan. His apparent family loyalty proves to have been an instrument of access and concealment.
About six months before Frankie arrives at Merroway Court
During Frankie’s first days at Merroway Court
The day before Henry’s death
That evening, during the aeroplane’s passage
Several weeks later, in Roger’s confession