The Philosopher's Stone. Hm. Alice knew a thing or two about it, but those had been already said, and she wasn't one to repeat answers. Still, she decided to give it a go. Wasn't that hard to come up with a different fact, right?

"Sir, y'know Hogwarts' vault number is 713. That's the one that got robbed two terms ago, yeah? My Gran- she's the bank manager at Gringotts- mentioned once that the school stored the Stone there for a bit. Luckily, I think someone got it out in time, 'cause there was a robbery planned for it. Or so I've heard. Bet they upped security after that by a fat load."

Gringotts. Safest place in the worst. Psh.