Answer:
The narrator seems to be overwhelmed and confused by the atmosphere around the house.
Explanation:
Edgar Allan Poe was an American writer and it is said he created the modern conception of short story. The Fall of the House of Usher is one of his most famous stories. It tells the story of an unnamed character (also the narrator) who comes back to a house (the one mentioned in the title) because one of his friend (Roderick) asks him to do so. From the beginning, the house looks spooky in and outside.
In the excerpt we can see that the narrator looks very impressed by the house and the atmosphere. There are some elements that indicate the confusion (specially the mystic vapor) in the speaker's voice. He is also overwhelmed by all the elements on the setting: the wall, trees and the tarn help crete an unknown context, so the speaker also looks overwhelmed by these elements that set the house in a different atmosphere.
