The Question and Answer section for The Fall of the House of Usher is a great resource to ask questions, find answers, and discuss the novel.
Usher sends the narrator a letter, which communicated his desire to see him.
I'm sorry, I don't knw what you mean. Please clarify your question.
The narrator and Usher go to the vault below the manision in order to entomb Usher's sister.
"At the request of Usher, I personally aided him in the arrangements for the temporary entombment. The body having been encoffined, we two alone bore it...