OldmissMarpleisonatrainridewhenshewitnessesamurderinapassingtrain.Shereportsittothepolicebuttheywon'tbelievehersincenobodycanbefoundtherecan'thavebeenanymurder,rightAsalways,shebeginsherowninvestigation.ThemurderwascommittedwhilepassingAckenthorpeHallandmissMarplegetsherselfajobthere,mixingcleaningandcookingwhilesearchingthehouseforclues.
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