The Thurnly Poisoning Crisis

This flow follows a supposed local prank through a household catastrophe and Tuppence's identification of the poisoner.

increasingBearing stren­gth in each eventdecreasing

The Chocolate Pattern

The Chocolate Pattern Repeated Illness Several households become ill after receiving anonymous chocolates laced with arsenic. The incidents seem to suggest a local practical joker or political agitator. A Deliberate Cover Lois Hargreaves discovers that the wrapping bears her own drawing, linking the parcel to someone inside her home. She seeks discreet help rather than alerting the police.

An Attempted Investigation

An Attempted Investigation Suspected Inheritance Motive Lois has recently inherited money and made a will favoring Dennis Radclyffe. Tommy and Tuppence see a possible motive but cannot yet establish who is threatening her. A Dangerous Delay Tommy agrees to visit Thurnly Grange the next day. The warning signs are present, but the case proceeds too slowly to protect the household.

The Sandwich Deaths

The Sandwich Deaths A Household Struck Lois and Esther Quant are dead after eating fig sandwiches; Dennis and Miss Logan are reported seriously ill. The earlier chocolate incidents make ordinary food poisoning seem unlikely. A New Investigation Tommy and Tuppence reach the house to find a crisis already underway. The question shifts from preventing an attempt to identifying how the poison was administered.

The Cocktail Clue

The Cocktail Clue A Timeline Rebuilt Tuppence learns that Dennis returned after the tea sandwiches had been cleared and later drank a cocktail. That detail suggests a second delivery of poison. Suspicion Redirected The sequence challenges the obvious theory that Dennis poisoned the food and feigned illness. Tommy takes the glass to Dr. Burton for analysis.

Ricin and the Inheritance

Ricin and the Inheritance A Medical Connection Ricin in the doctor's note and the open technical book implicate someone with the knowledge to extract the poison. Repeated marks on Miss Logan's arm suggest deliberate immunization. The Hidden Heir Tuppence identifies Miss Logan's motive: Dennis's death would make her his next of kin after Lois. Hannah's attempted arson interrupts the confrontation, and the poisoned Miss Logan dies.

A week before the agency visit

The day Lois visits Tommy

The following morning

During the first day at Thurnly Grange

Near the resolution