“The Castlecourt Diamond Case” is a lighthearted novella that becomes almost a
comedy of manners, a glimpse into early 20th century high society. Its subtitle is
“BEING A COMPILATION OF THE STATEMENTS MADE BY THE VARIOUS
PARTICIPANTS IN THIS CURIOUS CASE NOW, FOR THE FIRST TIME,
GIVEN TO THE PUBLIC.” The story’s structure is simple: Six of the story’s
characters give their statements about the theft of the diamonds, and in each
statement a few more facts are revealed. See if you can figure out the truth
before the Marchioness tells all at the end!