Here is the first page of Uncle Montague telling Edgar his tale.
"I was once a teacher, Edgar," said Uncle Montague, stretching the muscles of his neck as if he suddenly very tired. "Did you know that?"
"No, sir," I said. my uncle had never previously seen fit to tell me anything of consequence about his life.
Uncle Montague looked grim.
"Yes, Edgar," he answered. There was an almost imperceptible movement among the surrounding children - as if they had all flinched at the same time. "My house was a school then, and I was its headmaster: a cruel and wicked headmaster, Edgar"
If you do not know what some of the words there mean here are the definitions
Previously: earlier, before
Consequence: important or relevant
Imperceptible: slight, gradual, or subtle
After I had finished reading Uncle Montague's story it made me a bit sad because it linked all the stories in the book and some of the things that Uncle Montague had done shocked me because in the book, the author made him sound like he was a really kind man and that he couldn't do anything like that. It also explained the strange noises that Edgar kept hearing when he was with his uncle it also explained the feeling of being stroked when Edgar was walking to Uncle Montague's house and the temperature always being cold.