Hickory Dickory Dock

Miss Lemon, Poirot's flawless secretary, makes three mistakes in one letter. The reason: her sister, Mrs Hubbard, who runs a student hostel on Hickory Road in London, is upset about odd thefts. A light bulb, a stethoscope, boracic powder and a shoe go missing, and a rucksack is slashed. Poirot visits and advises calling the police. Soon after, student Celia Austin confesses to some of the thefts and dies of poison the next night. More deaths follow, including the owner's. Poirot finds the hostel was a base for smuggling and that the killer is student Nigel Chapman, who murdered to protect the racket and an old secret.

1. ReferenceMiss Lemon's sister

   The case comes from Mrs Hubbard, sister of Poirot's secretary Miss Lemon. She runs the student hostel where it all happens.

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2. Behind the scenesAnother nursery rhyme

   The title comes from another English nursery rhyme, the one about the mouse running up the clock. In the US it was Hickory Dickory Death.

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