Does Lupin always steal?
No. Some stories turn on detection, restitution, sentimental restraint, or revenge against people trying to deceive him.
Why does Holmes arrive too late?
Lupin understands the hidden passage and controls the timing, allowing the detective to solve the structure after the treasure is gone.
What unifies the stories?
Lupin's main achievement is authorship of appearances: he decides what police, victims, and readers believe they are seeing.
Themes and What the Ending Means
Performance: Disguise and role-playing are Lupin's most reliable tools.
Crime as puzzle: The collection values ingenious method and revelation more than punishment.
Reputation: Lupin protects the legend of his elegance as carefully as any stolen object.
Class: Aristocratic homes and inherited valuables become both targets and theatrical settings.