Logical and hallucination
In Poe’s short stories is frequent used the first person narrative to enter directly in to the interior world of the protagonist mind. In the stories are present to separate narrative traditions: ratiocination and grotesque. In the tales of ratiocination the protagonist is ever the same, while in the tales of the grotesque Poe used some convention of Gothic fiction, but exploring also psychology.
Feaures: The Fall of the House of Usher
This story is characterised by a breakdown in the separation of interior and exterior, and by a blurring between fantasy and reality. Another aspect familiar is the uncovering of a literally buried secret. In the story there is also the question of doubleness and splitting, in fact the House in the lake's waters might refer both to the symmetry of Roderick and Madeline, and to their eventual fusion in death.