Usher was whispering that he has been hearing sounds from his sister's coffin and that he is scared that she may have been buried alive. The passage referred to is from the book "The Fall of the House of Usher" by Edgar Allan Poe.
The Fall of the House of Usher is a horror story. The narrator whose name is not given arrives at the House of Usher.
His childhood friend - Roderick Usher is the owner of the house which is depicted as creepy, dull, and dark.
Roderick is shown to have a disease of the mind and has asked his friend the narrator to come and help.
The resolution of the conflict is that the narrator eventually watches as the house collapses and disappears into foggy waters.
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