What if Holmes, Watson, Irene, and Mary went to Hogwarts? What if they all met there as kids?

It's a crossover!

(Mary's POV)

I checked my list of supplies again as I sat in the empty train car.

Let's see: wand, cat, galleons,and all 7 books.

I looked out of the window of the train and could see a boy sprinting into the train as it whistled to signal its departure. Something about him caught my eye; he had black hair and a top hat on his head.

I was excited to meet new people and make new friends, and, of course, learn magic. I had bought a few simple spell books at Flourish & Blotts, and could conduct a fair few of them perfectly others were utter failures.

I turned as the door to the train compartment opened and the boy with black hair stood behind a boy I didn't recognize.

"Excuse me," said the boy, "May we join you?" He was tall with brown hair and iridescent blue eyes.

"Of course!" I gestured to the seats across from me.

He thanked me and they both walked in sitting down. We stared nervously at each other for a few moments before the boy whom I had seen running onto the train spoke, "Well, Hello Miss Morstan. My name is Sherlock Holmes." He said as he pulled out his wand and with a flick his hat disappeared off of his head, "Your last name is on the class schedule in your hand."

I looked down; I knew my name was on the schedule but I hadn't noticed him looking at it.

"Um-Yes, My name is Mary Morstan; it's a pleasure to meet you." I held out my hand.

Sherlock sniffed and said, "The pleasure is all mine." Not taking my hand.

His companion reached out and shook my hand warmly, "My name is John Watson, Holmes and I have been friends for as long as I can remember! Nice to meet you. May I see your schedule?"

We all noticed that we had the same exact schedule, "Well what a coincidence!" I said.

We all talked and Sherlock said after several minutes, "No one in my family has been to Hogwarts, they're all muggles!" He chuckled.

"My mother is a witch," John said to me, "We thought my father was going to faint when we told him!"

I laughed, "I have the opposite! My father is a wizard and my mother is a…muggle?"

Sherlock said, "It means a non-witch or wizard."

SLAM

The door to our compartment flew open then shut and standing in the middle of us was a girl with dark brown hair and matching brown eyes. She had a huge grin on her face as plopped down next to me and spoke,

"Hello! My name is Irene Adler! What's yours?"