Who is Usher?
He works at the local movie theater. You probably didn’t know his name but he directs people to their seats.
He is a famous singer or rapper.
Edgar Allan Poe apparently wrote a book about the tragedy. You can buy it on Amazon, or apparently download it for free from the US State Department:
https://americanenglish.state.gov/files/ae/resource_files/the_fall_of_the_house_of_usher.pdf