Chapter 43: Dagmar Ralston's Letter to Irene Wallenberg — Summary & Analysis

⚠️ Spoiler Warning: This guide contains detailed spoilers for the entire novel. Proceed only if you've finished reading or are comfortable knowing the plot.

Summary

Chapter 43 is a letter dated December 28, 1932, from Dagmar Ralston to her friend Irene Wallenberg. Dagmar writes that she has kept a secret from Irene, and now, with snow falling and the day short, she must confess everything.

She explains that her brother Phillip became obsessed with eugenics while in medical school, admiring European fascists and holding racist views. After their father died, Phillip controlled the family fortune, and Dagmar was financially dependent on him. In 1915, Phillip called her to England, where he had rented a house in the Cotswolds. There, Dagmar found six babies—three slightly older, three newborns—whom Phillip claimed to have adopted from mothers unable to care for them. Dagmar agreed to act as their mother, and she felt an immediate bond, especially with Clara.

Over the years, Dagmar helped Phillip with his medical work and office records. While going through his notes from the year the children were born, she found a list of dates and women's names—Bristol, Stroud, Cheltenham, London—and realized these were birth records. She then decoded a series of single letters in his daily entries, which corresponded to the women he had been seeing. She concluded that Phillip had fathered all six children, deliberately impregnating these women as part of his eugenic experiment. When she confronted him indirectly, he warned her to stay silent.

Later, Faye arrived—a tall, glamorous former actress who genuinely loved the children. Dagmar accepted her role as the primary mother figure while Faye supported the household. Then Max was born. Phillip treated Max as a special project, measuring and charting his development, while Faye spoiled him. Max became violent, biting and hurting staff, and eventually caused Edna Danforth to fall down the stairs, resulting in a serious head injury. Phillip refused to discipline Max or seek outside help.

Clara, perceptive and protective, began to fear Max. One night Dagmar saw Clara steal a knife and then stand guard outside Max's door for hours. Later, Clara pushed Max into the water during a boat ride, trying to force him to learn to swim.

On an extraordinarily hot day, everyone in the house fell into a deep sleep. Dagmar woke hours later to find that Max had drowned. Clara carried his body in. The police arrived, but Clara went missing. Dagmar, suspecting foul play, searched Unity's room and found a hidden compartment in a writing desk Phillip had given Unity. Inside was a nearly empty bottle of Veronal—a sleeping drug—and a paper with dosage calculations. Dagmar realized Unity had drugged the entire household to kill Max.

Later that evening, Clara was found on the roof. Dagmar, along with William and Benjamin, saw her fall to her death. As Dagmar lay recovering in the great hall, she overheard Unity confess to Phillip that she had killed Max and then fought with Clara on the roof, sending her off.

The family left Morning House for New York, then moved to Beacon so Faye could receive treatment at a private hospital. Phillip refused to act on Unity's guilt, insisting the deaths be called accidents. Dagmar, seeing Phillip's weakness, decided she must act. She prepared a thermos of hot cider laced with morphine, planning to invite Unity for a walk onto a frozen pond where the ice was thin. She intended to kill Unity and herself, believing a mother cannot survive killing her child. She ends the letter saying she is at peace and that by the time Irene reads it, the act will be done.

Key Events

Dagmar discovers Phillip's coded notes revealing he fathered all six adopted children.
Faye arrives and becomes a loving mother figure, while Dagmar retains her role.
Max is born and exhibits increasingly violent behavior, injuring staff and Edna Danforth.
Clara attempts to teach Max to swim, pushing him into the water.
On a hot day, everyone is drugged with Veronal; Max drowns.
Dagmar finds Unity's hidden Veronal bottle and dosage calculations.
Clara falls from the roof; Unity confesses to killing Max and Clara.
The family moves to New York, then Beacon; Phillip refuses to address Unity's guilt.
Dagmar decides on a murder-suicide plan using morphine-laced cider and thin ice.

Character Development

Dagmar Ralston: The letter reveals her transformation from a dependent sister to a determined protector. She initially accepts her role as mother to the six children, then becomes a vigilant observer. Her discovery of Phillip's deception and Unity's crimes pushes her to take drastic action, culminating in her decision to kill Unity and herself. She sees herself as a mother who failed her children and must atone.
Phillip Ralston: His character is exposed as a weak, tyrannical man. His eugenic beliefs drive him to treat his children as experiments. He refuses to discipline Max, ignores Unity's guilt, and insists on covering up the deaths. Dagmar notes that tyrants are weak at heart because they build their world on fear.
Unity: Though not directly present in the letter, her actions are revealed through Dagmar's account. She is portrayed as calm, proud, and utterly convinced of her actions, having drugged the household and killed Max and Clara.
Clara: She emerges as a perceptive and protective figure, sensing the danger Max poses and trying to guard against it. Her death is tragic, and her role as a sentry is highlighted.
Faye: She is shown as a loving but overwhelmed mother, unable to counterbalance Phillip's influence on Max. Her breakdown after the deaths leads to her hospitalization.

Themes, Symbols, or Motifs

Eugenics and selective breeding: Phillip's belief system drives the entire plot—he deliberately fathers children to create a