You might want to go to this website for the answer!
http://glanguagearts.pbworks.com/w/file/fetch/93056184/Slave%20Trade%20Love%20Story%20Read%20Works.p...
Answer:
1.The narrator is shocked and worried by Usher's condition. He is unlike the Roderick Usher the narrator once knew.
2.Sorry don’t know the second answer
Hope the first answer helps
I’m not sure Maybe the main idea is the plot