At one point in the narrative a schoolgirl mentions one of the characters from Mrs McGinty’s Dead, and Poirot reminisces: this time without giving away the solution of the earlier novel. The reader enjoys such harmless and cosy links between novels, but not when vital information is carelessly and unnecessarily revealed.

Julia, the schoolgirl, is taken to a performance of Faust at Covent Garden. If Mrs Christie had been in the habit of researching in the interests of accuracy, she would have discovered that Gounod’s opera had not been staged at Covent Garden since 1938. Julia was taken either to Sadler’s Wells Theatre, or the Welsh National Opera, or the old Carl Rosa Company on tour. Or, of course, to Paris!

About Charles Osborne

This essay was adapted from Charles Osborne’s The Life and Crimes of Agatha Christie: A Biographical Companion to the Works of Agatha Christie (1982, rev. 1999). Mr. Osborne was born in Brisbane in 1927. He is known internationally as an authority on opera, and has written a number of books on musical and literary subjects, among them The Complete Operas of Verdi (1969); Wagner and His World (1977); and W.H. Auden: The Life of a Poet (1980). An addict of crime fiction and the world’s leading authority on Agatha Christie, Charles Osborne adapted the Christie plays Black Coffee (Poirot); Spider’s Web; and The Unexpected Guest into novels. He lives in London.

About Agatha Christie

Agatha Christie is known throughout the world as the Queen of Crime. Her books have sold over a billion copies in English and another billion in 100 foreign languages. She is the most widely published author of all time and in any language, outsold only by the Bible and Shakespeare. Mrs Christie is the author of eighty crime novels and short story collections, nineteen plays, and six novels written under the name of Mary Westmacott.

Agatha Christie’s first novel, The Mysterious Affair at Styles, was written towards the end of World War I (during which she served in the Voluntary Aid Detachments). In it she created Hercule Poirot, the little Belgian investigator who was destined to become the most popular detective in crime fiction since Sherlock Holmes. After having been rejected by a number of houses, The Mysterious Affair at Styles was eventually published by The Bodley Head in 1920.

In 1926, now averaging a book a year, Agatha Christie wrote her masterpiece. The Murder of Roger Ackroyd was the first of her books to be published by William Collins and marked the beginning of an author-publisher relationship that lasted for fifty years and produced over seventy books. The Murder of Roger Ackroyd was also the first of Agatha Christie’s works to be dramatised—as Alibi—and to have a successful run in London’s West End. The Mousetrap, her most famous play, opened in 1952 and runs to this day at St Martin’s Theatre in the West End; it is the longest-running play in history.

Agatha Christie was made a Dame in 1971. She died in 1976, since when a number of her books have been published: the bestselling novel Sleeping Murder appeared in 1976, followed by An Autobiography and the short story collections Miss Marple’s Final Cases; Problem at Pollensa Bay; and While the Light Lasts. In 1998, Black Coffee was the first of her plays to be novelised by Charles Osborne, Mrs Christie’s biographer.