Structural Criticism on "The Purloined Letter"

STRUCTURAL CRITICISM ON THE PURLOINED LETTER
The narrator and Dupin are in Dupin's office then Monsieur G (the prefect) comes and tells them the story of a purloined letter which was stolen by the minister. Despite all the attempts and researches it cannot be found.
While trying to find the letter what the police did are all catalysers. While talking about the event Dupin tells "Perhaps it is the very simplicity of the thing which puts you at fault." This sentence has an important role in the resolution part. So we can say that it is nuclei.
"The Purloined Letter" is an extra ordinary ex…