A Study in Gold and Garnet
Here's chapter 3. It's really short, sorry!
Sherlock and John passed the rest of the train ride more or less in silence. This wasn't because John didn't want to talk, but because Sherlock seemed to be in a depressed mood. It had come on suddenly, a little while after they had finished talking. John was a little perturbed with this mercurial shift, but he decided it would be best not to disturb Sherlock, who was currently laying curled up in a ball with his back towards John. As the time passed however, and their destination drew nearer, John longed for some preparation of what was to come.
"Sherlock," he whispered, tapping him hesitantly. "You know stuff about Hogwarts, right?"
"Yes," he sighed, rolling over. "I am a pureblood after all, and I have an older brother, so I do know quite a bit about Hogwarts."
"Pureblood means a wizarding family, right?" John asked haltingly.
"Yes, but specifically a wizarding family without muggles marrying in so 'the blood isn't tainted' or some rubbish. Honestly, I think everyone makes too big a fuss about being pureblood."
John nodded, trying to take all this information in, then asked, "What are we going to do at Hogwarts first, once we get there?"
"Sorting ceremony."
"What's that?"
"It's where we get put into the houses that match our personalities and interests."
"And there's four houses, right? Something to do with animals?"
"Yes," Sherlock sighed. "You really don't know anything about wizarding, do you? There's Gryffindor, Slytherin, Hufflepuff, and Ravenclaw. Put bluntly, Gryffindor is for the brave, Slytherin for the ambitious, Hufflepuff for the kind, and Ravenclaw for the wise."
"Do you know which house you'll be in?"
Sherlock paused, then said, "I have an idea, but it is a capital mistake to theorize prematurely, so I shan't share it with you."
"Oh, ok," John replied, slowly. This kid really has a big vocabulary, he thought privately.
Suddenly, Sherlock jumped up, grabbed one of his bags, and walked to the door. As he opened it, he turned and said to John, "You might want to put on your robes. We'll be arriving soon."