S03E01 - How Does Your Garden Grow?

Poirot receives a strange letter for assistance from an old lady called Miss Amelia Barrowby who lives at Rosebank in Charman's Green. She is extremely vague in defining exactly what the problem is but states several times that discretion is paramount and that family is involved. The letter intrigues Poirot who has Miss Lemon draft a reply saying that he is at the lady's service.
Five days later Miss Lemon sees an announcement in the "personal column" of The Morning Post about the death of Miss Barrowby. He sends a letter to Rosebank saying that he will call on Miss Barrowby but this is to provoke a response from the next of kin and he duly receives a reply from Mary Delafontaine, the lady's niece, saying that his services are no longer required. Nevertheless, he goes to the house and admires the well-maintained garden with its spring flowers and edging of shells. Let into the house by a maid, the first person he meets is a young Russian girl called Katrina Reiger who speaks cryptically of the money that by rights is hers. She is interrupted by Mrs Delafontaine and her husband who dismisses Katrina and they meet Poirot. They seem shocked to find that he is a detective.

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