As Neville walked away, Harry looked at the Famous Wizard card.

"Dumbledore again," he said, "He was the first one I ever--"

He gasped. He stared at the back of the card. Then he looked up at Ron and Hermione. (Scroll down)

"I've found him!" he whispered. "I've found Flamel! I told you I'd read the name somewhere before, I read it on the train coming here -- listen to this: 'Dumbledore is particularly famous for his defeat of the dark wizard Grindelwald in 1945, for the discovery of the twelve uses of dragon's blood, and his work on alchemy with his partner, Nicolas Flamel'!"

Hermione jumped to her feet. She hadn't looked so excited since they'd gotten back the marks for their very first piece of homework.

"Stay there!" she said, and she sprinted up the stairs to the girls' dormitories. Harry and Ron barely had time to exchange mystified looks before she was dashing back, an enormous old book in her arms.

"I never thought to look in here!" she whispered excitedly. "I got this out of the library weeks ago for a bit of light reading."

"Light ?" said Ron, but Hermione told him to be quiet until she'd looked something up, and started flicking frantically through the pages, muttering to herself.

At last she found what she was looking for.

"I knew it! I knew it!"

"Are we allowed to speak yet?" said Ron grumpily. Hermione ignored him.

"Nicolas Flamel," she whispered dramatically, "is the only known maker of the Philosopher's Stone!"

This didn't have quite the effect she'd expected.

"The what?" said Harry and Ron.

"Oh, honestly, don't you two read? Look -- read that, there."

She pushed the book toward them, and Harry and Ron read:

The ancient study of alchemy is concerned with making the Philosopher's Stone, a legendary substance with astonishing powers. The stone will transform any metal into pure gold. It also produces the Elixir of Life, which will make the drinker immortal.

There have been many reports of the Philosopher's Stone over the centuries, but the only Stone currently in existence belongs to Mr. Nicolas Flamel, the noted alchemist and opera lover. Mr. Flamel, who celebrated his six hundred and sixty-fifth birthday last year, enjoys a quiet life in Devon with his wife, Perenelle (six hundred and fifty-eight).

"See?" said Hermione, when Harry and Ron had finished. "The dog must be guarding Flamel's Philosopher's Stone! I bet he asked Dumbledore to keep it safe for him, because they're friends and he knew someone was after it, that's why he wanted the Stone moved out of Gringotts!"

"A stone that makes gold and stops you from ever dying!" said Harry. "No wonder Snape's after it! Anyone would want it."

"And no wonder we couldn't find Flamel in that Study of Recent Developments in Wizardry," said Ron. "He's not exactly recent if he's six hundred and sixty-five, is he?"