For one instant he stopped dead, staring at the figure on the bed, and, at the same instant, Mrs. Inglethorp cried out in a strangled voice, her eyes fixed on the doctor: "Alfred, Alfred, , " Then she fell back motionless on the pillows. 
The doctor was responsible for Mrs. Inglethorp's shock.
mnli hypothesis: The doctor was responsible for Mrs. Inglethorp's shock. premise: For one instant he stopped dead, staring at the figure on the bed, and, at the same instant, Mrs. Inglethorp cried out in a strangled voice, her eyes fixed on the doctor: "Alfred, Alfred, , " Then she fell back motionless on the pillows. 