Like several of Christie's novels (e.g., Hickory Dickory Dock, One, Two, Buckle My Shoe) the title and substantial parts of the plot reference a nursery rhyme, in this case Sing a Song of Sixpence.
Like several of Christie's novels (e.g., Hickory Dickory Dock, One, Two, Buckle My Shoe) the title and substantial parts of the plot reference a nursery rhyme, in this case Sing a Song of Sixpence.