Why Didn't They Ask Evans_ - Agatha Christie
Bobby Jones is playing golf with Dr Thomas in the Welsh seaside town of Marchbolt. Seeking the golf ball he hit over the cliff edge, he sees a man lying below. The doctor says the man is fatally injured and seeks help. Bobby stays with the man, who briefly regains consciousness, says "Why didn't they ask Evans?", and then dies. Bobby finds a photograph of a beautiful woman in the man's coat pocket, but no identification. Roger Bassington-ffrench, a stranger wearing plus fours, offers to stay with the body so Bobby can play the organ at his father's church.
The dead man is identified as Alex Pritchard by his sister, Amelia Cayman, at the inquest. She is said to be the woman in the photograph; Bobby wonders how such a beautiful girl could become such a coarse older woman. After the inquest, Mrs Cayman and her husband want to know if Pritchard had any last words. Bobby says that he did not. Later, when talking with his friend Frankie (Lady Frances Derwent), Bobby remembers that Pritchard did have last words and writes to the Caymans to tell them.
Bobby receives and rejects an unexpected job offer from a firm in Buenos Aires. Soon afterwards Bobby nearly dies after drinking from a poisoned bottle of beer. The local police do not pursue this. Frankie thinks Bobby is targeted for murder. Bobby agrees when he sees the issue of the local paper with the photograph used to find Pritchard's sister. Bobby sees that is not the one he found in the dead man's pocket. He and Frankie realise that Bassington-ffrench swapped the photographs and that Mrs Cayman is not related to the dead man at all. Bobby and Frankie search for Bassington-ffrench. They trace him to Merroway Court in Hampshire, owned by Roger's brother and sister-in-law, Henry and Sylvia. They stage a car accident outside the house with the help of a doctor friend so that Frankie, feigning injury, will be invited to stay to recover. Frankie produces a newspaper cutting about the mysterious dead man; Sylvia remarks that he looks like Alan Carstairs, a traveller and big-game hunter who was a friend of John Savage, a millionaire who had killed himself after learning he had terminal cancer.
Frankie meets two neighbours of the Bassington-ffrenches – Dr Nicholson and his younger wife, Moira. Dr Nicholson runs a local sanatorium. Frankie writes to Bobby and gets him to investigate the establishment. On the grounds at night, Bobby encounters a girl who says that she fears for her life; she is the original of the photograph that Bobby found in the dead man's pocket. Several days later, Moira Nicholson turns up at the local inn where Bobby stays in his disguise as Frankie's chauffeur. She says her husband is trying to kill her and says she knew Alan Carstairs before her marriage to the doctor. Bobby introduces her to Frankie. Moira suggests they ask Roger if he took the photograph from the body of the dead man. At the next opportunity, Frankie asks. Roger admits that he took the photo, recognising Moira and wanting to avoid scandal for her. Frankie leaves after Henry is found dead in his home, an apparent suicide.
Interested in the will of the late John Savage, Frankie consults her family's solicitor in London and learns that Carstairs consulted him too. Savage was staying with Mr and Mrs Templeton when he became convinced he had cancer, although one specialist told him he was perfectly well. When he died by suicide, his will left seven hundred thousand pounds to the Templetons, who have apparently since left England. Carstairs was on their trail, suspicious of the will. Bobby is kidnapped and Frankie is lured to the same isolated cottage by Roger. They manage to turn the tables on him with the timely arrival of Badger Beadon and find a drugged Moira in the house. When the police arrive, Roger has escaped.
Bobby and Frankie trace the witnesses to the signing of John Savage's will. They are the former cook and gardener of Mr and Mrs Templeton. Mr Templeton being also Mr Leo Cayman. The cook tells them that Gladys, the parlourmaid, was not asked to witness the will, made the night before Savage died. Frankie realises that the cook and gardener did not see Mr Savage before the signing, while the parlourmaid did and would have realised that it was Roger in the "deathbed" who wrote the will and not Mr Savage. The full name of the parlourmaid is Gladys Evans, hence the reason for Carstairs' question, "Why didn't they ask Evans?"
Tracing the parlourmaid, they discover she is now the married housekeeper at Bobby's home. Carstairs was trying to find her. Returning to Wales, they find Moira, who claims she is being followed by Roger and has come to them for help. Frankie is not deceived and spoils Moira's attempt to poison their coffee. Moira was Mrs Templeton and is Roger's co-conspirator. Moira then attempts to shoot Frankie and Bobby in the café when she is exposed, but is overpowered and arrested. Several weeks later, Frankie receives a letter from Roger, posted from South America, in which he confesses to murdering Carstairs, murdering his brother, and conspiring in all of Moira's past crimes. Bobby and Frankie realise they are in love and become engaged.