The Tape-Measure Murder — Agatha Christie

Miss Politt has been waiting and waiting outside Laburnum Cottage for Mrs. Spenlow, to no avail. She nervously acquires the help of her next-door neighbor, whose gumption and persistence reveal that Mrs. Spenlow is dead on the hearthrug. The whole of St. Mary Mead is convinced the murderer is Mr. Spenlow, who shows no emotion upon his wife's sudden death, but, with characteristic diligence, Miss Marple reveals that it is perhaps not that simple.