    Professor Quirrell, they all agreed, was very strange. His Defence Against the Dark Arts classroom smelled like garlic, so much so that there were moments where Harry thought his eyes were going to start watering from the smell. Ron told Harry and Hermione in a low voice that his brothers – who he had barely mentioned, and who he had never so much as looked at the entire time they had been at Hogwarts – had told him that Professor Quirrell’s turban was full of garlic too. Garlic, Harry learned, was a vampire repellent, which brought up lots of interesting questions. As for the content of his lessons, Professor Quirrell diligently followed the textbook, and didn't often have any stories to tell of his own.