In Agatha Christie’s short story “The Adventure of the Egyptian Tomb”, the widow of a famous Egyptologist consults Poirot on the suspicious death of her husband and an American financier, Bleibner. The mystery takes Poirot and Hastings to Egypt to investigate the site of an archaeological dig. But who could want the two men dead?   

In Agatha Christie’s short story, “The Mystery of Hunter's Lodge,” Poirot and Hastings are enlisted by a Mr. Roger Havering to help investigate the murder of his aristocrat uncle at his hunting lodge. Hastings discusses the murder with the housekeeper on the scene, but Poirot quickly deduces that her story doesn’t add up. This short story appeared in the May 16, 1923 issue of The Sketch magazine.  

In Agatha Christie’s short story, “The Adventure of the Cheap Flat,” Poirot’s suspicions are aroused when he hears of a sweetheart deal on a flat. Doing a little freelance investigating, he soon learns that the flat is at the center of a case of international espionage and a potentially fatal double-cross. This short story originally appeared in the May 9, 1923 issue of The Sketch magazine.  

Waiting for his car to be fixed, Mr. Satterthwaite sits in a tea shop called the Harlequin cafe, thinking of his friend Harley Quin, whom he hasn’t seen in many years. Then, in a burst of sunshine, the very same Mr. Quin walks through the door, along with his diligent dog, Hermes. Satterthwaite is telling him the very long history of the family he is off to visit, when their conversation is interrupted by the abrupt entrance of a member of that very same family, intent upon replacing her harlequin cups.

Hercule Poirot is asked by Prince Paul of Maurania to solve the murder of Henry Reedburn, which has greatly distressed the Prince's fiancée, the famous dancer Valerie Saintclair. The only other witnesses seem to be a family of four who were playing bridge near an open window when she staggered in, crying, "Murder!"