"Your concern is noted," he says, somewhere between rank sarcasm and an attempting an illusion of sincerity. After all, there's nothing to say she wouldn't simply fail to meet him. And then where will you be, Bartimaeus? You should have taken her up on her offer! Wouldn't it have been better to keep an eye on the girl to make sure she didn't scuttle away into some dark corner?

Oh well. Too late now.

The coins are pocketed alongside the ones he stole from her earlier on the stairs. "See you soon," he reinforces, and then is pushing through the crowded public house and is gone.