Hermione pursed her lips, still feeling caught, but she sat back down and let the parchment map roll back out across the cluttered desk. It was unmistakeably Gringott's, but there was no way she could tell him anything they'd been discussing about it earlier.
"I know that we've been secretive, since we've come here. We don't mean to be rude, you've been very hospitable..." That sounded like a supremely weak explanation. "But I can't tell you what we're looking for. It's important, for Harry, that it stays a secret. Dumbledore wanted it that way."