Hermione didn’t answer. Ron looked around.

“Where is she?”

Harry turned too. They were at the top of the steps now, watching the rest of the class pass them, heading for the Great Hall and lunch.

“She was right behind us,” said Ron, frowning.

Malfoy passed them, walking between Crabbe and Goyle. He smirked at Harry and disappeared.

“There she is,” said Harry.

Hermione was panting slightly, hurrying up the stairs; one hand clutched her bag, the other seemed to be tucking something down the front of her robes.

“How did you do that?” said Ron.

“What?” said Hermione, joining them.

“One minute you were right behind us, the next moment, you were back at the bottom of the stairs again.”

“What?” Hermione looked slightly confused. “Oh—I had to go back for something. Oh no—”

A seam had split on Hermione’s bag. Harry wasn’t surprised; he could see that it was crammed with at least a dozen large and heavy books.

“Why are you carrying all these around with you?” Ron asked her.

“You know how many subjects I’m taking,” said Hermione breathlessly. “Couldn’t hold these for me, could you?”

“But—” Ron was turning over the books she had handed him, looking at the covers. “You haven’t got any of these subjects today. It’s only Defense Against the Dark Arts this afternoon.”

“Oh yes,” said Hermione vaguely, but she packed all the books back into her bag just the same. “I hope there’s something good for lunch, I’m starving,” she added, and she marched off toward the Great Hall.

“D’you get the feeling Hermione’s not telling us something?” Ron asked Harry.

• • •

Professor Lupin wasn’t there when they arrived at his first Defense Against the Dark Arts lesson. They all sat down, took out their books, quills, and parchment, and were talking when he finally entered the room. Lupin smiled vaguely and placed his tatty old briefcase on the teacher’s desk. He was as shabby as ever but looked healthier than he had on the train, as though he had had a few square meals.

“Good afternoon,” he said. “Would you please put all your books back in your bags. Today’s will be a practical lesson. You will need only your wands.”

A few curious looks were exchanged as the class put away their books. They had never had a practical Defense Against the Dark Arts before, unless you counted the memorable class last year when their old teacher had brought a cageful of pixies to class and set them loose.

“Right then,” said Professor Lupin, when everyone was ready. “If you’d follow me.”