Knox’s Detective Story Decalogue

Broadsheet advertisement for the first appearance of The Hound of the Baskervilles in The Strand Magazine in August, 1901.
Broadsheet advertisement for the first appearance of The Hound of the Baskervilles in The Strand Magazine in August, 1901.
  1. The criminal must be mentioned in the early part of the story, but must not be anyone whose thoughts the reader has been allowed to know.
  2. All supernatural or preternatural agencies are ruled out as a matter of course.
  3. Not more than one secret room or passage is allowable.
  4. No hitherto undiscovered poisons may be used, nor any appliance which will need a long scientific explanation at the end.
  5. No Chinaman must figure in the story.
  6. No accident must ever help the detective, nor must he ever have an unaccountable intuition which proves to be right.
  7. The detective himself must not commit the crime.
  8. The detective is bound to declare any clues which he may discover.
  9. The “sidekick” of the detective, the Watson, must not conceal from the reader any thoughts which pass through his mind: his intelligence must be slightly, but very slightly, below that of the average reader.
  10. Twin brothers, and doubles generally, must not appear unless we have been duly prepared for them.

— Ronald Knox’s Preface to Best Detective Stories of 1928-29.

Curator: Christian Clay Columba Campbell

Christian Clay Columba Campbell is a Roman Catholic of the Anglican Use. As Senior Warden of the Cathedral of the Incarnation (Orlando, FL), he organised the process by which the parish accepted the Apostolic Constitution Anglicanorum coetibus, petitioning to join the Catholic Church. The Anglican Cathedral is now the Church of the Incarnation in the Personal Ordinariate of the Chair of St. Peter. Personal queries should be directed to me at eccentricbliss dot com.

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