"So where exactly are we going?" asked Draco. He had his eyes closed while Alice pulled him along the corridors by his hand.
"It's a surprise," she said. "No peeking!" she added as Draco tried to open his eyes a little. He closed them again.
She walked into Moaning Myrtle's lavatory.
"Okay, open your eyes." Draco opened his eyes.
"And you've brought me to the girl's lavortory because . . . ?"
"I couldn't find any othe spot where we could be alone. Remember when I said I would teach you how to cast a patronus?"
"Follow me," he said. "I know a better place."
He hurried along one of the corridors with Alice trailing behind him.
He stopped on one of the corridors and stood facing a wall.
"We need a place to be alone, we need a place to be alone, we need a place to be alone," said Draco.
A door started appearing in the wall. When it was fully formed, Draco pushed the door open. When they walked into the room, the door shut and turned back into wall.
"The room of requirement," said Alice. "Why didn't I think of that?"
Draco took out his wand.
"Alright," said Alice. "First you have to think of a memory. The happiest moment of your life. It has to be powerful."
Draco thought for a moment.
"Do you have one?"
"Yeah," he said.
"Good. Now watch me. Expecto Patronum!"
A silvery-blue doe shot out of her wand and bounded around the room, before fading until it disappeared. Draco smiled.
"Now you try," said Alice.
A small blue puff appeared near the tip of his wand, but nothing happened.
"Not a powerful enough memory," said Alice. "What was your memory?"
"When Blaise got sent to Azkaban." Alice winced at the name. She took a few deep breaths, then continued speaking.
"You're trying to fuel the spell with anger and hatred. Patronuses aren't like spells you use to attack. You have to use happiness and love as your drive. Think of something happier. You may have been happy to see him go to prison," she said, refusing to say Blaise's name. "But you were also probably angry that your friend had done what he did and sad about your friend having to leave you. Try a different memory."
"Expecto Patronum!" Another puff of blue smoke.
"Which memory was it that time?"
"When we were all together, laughing and joking round in the Great Hall together."
"No, try something more powerful."
"Expecto Patronum!" Nothing happened.
"You're flicking your wrist too much. Make a large circle in the air with your wand."
A blueish-silver eagle burst from the end of his wand and soared around the room in circles.
"Yes! Yes!" exclaimed Alice. "Brilliant work! Beautiful! Well done, Draco!"
Draco lowered his wand and the eagle faded away.
"That was incredible!" said Draco.
"It was bloody amazing! What memory did you use that time?"
"Um . . . on-on the astronomy tower, when we . . . kissed."
"Oh . . . Well, if you can cast a patronus that strong, that memory's the one you should use all the time. That was one of the finest patronuses I've ever seen. Usually it's difficult to cast patronuses, especially with Slytherins. It's harder for them to find happy memories for some reason."
Draco nodded. "What was your memory?"
Alice hesitated, but then smiled.
"I'll tell you another time. It's very complicated. And it happened long before you were born."