The Sunningdale murder case is a detective-story puzzle in which a familiar blue golf coat becomes a false sign of identity. Captain Anthony Sessle is found dead on a golf course, and the clues appear to implicate Doris Evans; Tommy Beresford instead reconstructs a disguise that points to Hollaby’s son and connects the killing to suspected financial crimes at the Porcupine Assurance Co. The case is related retrospectively by Tommy, who turns a seemingly settled accusation into a question of who was seen, and what the witnesses actually recognized.

Discovery and suspicion

Just over three weeks before Tommy tells the story, two club members discover a man lying face down on the seventh tee at Sunningdale Golf Links. They identify him as Captain Anthony Sessle, a familiar figure on the course, recognizable for his unusually bright blue golf coat. Because Sessle often practiced early, his death is initially thought to have resulted from heart trouble. A doctor’s examination establishes instead that he was murdered with a woman’s hat pin, and that he had been dead for at least twelve hours.

The last person known to have seen Sessle alive was his friend and Porcupine Assurance Co. partner, Mr. Hollaby. Hollaby says that during their round he saw a tall woman in brown speak to Sessle. The Captain changed his manner abruptly, said the light was too bad, and left by a narrow path leading toward the Windlesham road and his bungalow. Hollaby and the other players later discussed the woman, but none could identify her. On that Wednesday the bungalow’s resident couple were in town as usual, and Mrs. Sessle was away visiting, circumstances that meant no one immediately noticed that the Captain had not returned.

Doris Evans and the apparent case

The murder briefly becomes a public sensation, but investigators can initially suggest no motive. A week after the killing, Doris Evans is arrested and charged. The physical and circumstantial clues seem to converge on her: a strand of fair hair was found in Sessle’s hand, and flame-colored wool was caught on a button of his blue coat. Inquiries also establish that a young woman in a flame-colored coat and skirt arrived by train at about seven in the evening asking directions to Sessle’s home, then returned to the station roughly two hours later with her hat awry and hair disordered, apparently agitated and repeatedly looking behind her.

Doris’s account is that she encountered Sessle after reaching his house and was threatened by him with a revolver. She says that she struggled to get free and ran across the golf course, falling twice on the way back to the road and station. The struggle offers an innocent explanation for the hair and wool evidence: Sessle could have pulled out a strand of her hair and caught fibers from her coat on a button. A revolver that had not been fired was found in furze near the body. Doris denies stabbing him, though Tommy considers that an act of self-defence with the hat pin could have been possible. Her account has not changed, but the charge against her does not resolve the central question: who was the tall woman in brown, and who actually killed Sessle?

The coat and the reconstruction

Tommy’s explanation turns on the path and the dense furze beside it. The body could be concealed there until morning, away from the view of golfers following behind. In his reconstruction, a woman approaches Sessle and draws him out of sight; he recognizes the person as a man in disguise and goes along to find out why they have met. The disguise conceals a single fatal attack with the hat pin. The killer then hides Sessle’s body in the furze, removes the Captain’s blue coat and cap, and changes out of the skirt, hat, and curls. Wearing Sessle’s familiar clothes, the killer returns to the seventh tee.

The trick depends on the difference between recognizing a person and recognizing a garment. The golfers behind could see the distinctive blue coat but not the wearer’s face, so they assumed Sessle had returned. His playing, however, seemed unlike his usual style. Tommy treats that discrepancy not as an incidental oddity but as evidence: the man playing under Sessle’s appearance was a different man. The coat functions as a convincing public label, while the altered play quietly contradicts it.

Suspect, motive, and police response

Tommy argues that the killer must have known the household’s Wednesday routine and that Mrs. Sessle was away. The person also needed to be able to use the Captain’s latch key. He therefore suspects Hollaby’s son, who was about Sessle’s age and height and, like him, clean-shaven. Tommy goes further, adopting Tuppence’s suggestion that Hollaby and his son were the real embezzlers. On that reading, the son had the access and familiarity required for the disguise, while his father’s alibi placed the older Hollaby in public view throughout the investigation.

The financial disclosures strengthen the suspected connection without yet amounting to a completed court finding. The Porcupine Assurance Co. has gone into liquidation, and its accounts show a daring misappropriation of funds. Tommy reasons that Sessle was on the brink of exposure and ruin. Hollaby and his son, he says, had been suspected over the company’s figures, but the murder initially disrupted the police’s theories; neither the older Hollaby’s alibi nor the attention focused on Doris prompted anyone to ask what the son had been doing that evening. The apparent absence of a motive gives way to a possible chain linking financial discovery, access, concealment, and murder.

Inspector Marriot has been listening from the next table. He confirms that the police had not been satisfied with the Porcupine accounts and had suspected the Hollabys, though they lacked grounds to proceed. He praises Tommy’s blue-coat deduction and says the police will confront the younger Hollaby with Doris to see whether she recognizes him. Marriot also promises that Blunt’s Brilliant Detectives will receive credit. The account therefore ends with a proposed test of Tommy’s reconstruction, not with a narrated confession or trial verdict.

Narrative significance

Tommy presents the case as a lesson in how ordinary evidence can mislead when its signs are read too quickly. Hair, wool, a revolver, a familiar coat, and an alibi each seem to point in one direction; reconsidered together, they permit a different sequence of events. The blue coat is both the disguise’s practical instrument and the clue that makes the disguise legible: its familiarity persuades witnesses, while the mismatch in the wearer’s golf exposes the substitution.

The case also sets an individual accusation beside an institutional motive. Doris faces trial on clues that fit her presence and appearance, while the collapse of the insurance company reveals a larger financial scandal and directs attention toward the partners’ family. Tommy’s solution does not erase the uncertainty that has surrounded the case; it reorganizes it into a testable suspicion, leaving the police to confront the person he believes the witnesses have not yet been asked to recognize.