"Of course. I've seen you out during the day, after all, I should have known. But really now," Éponine said, countering his mock offense with some feigned indignation of her own, "it isn't very nice of you to keep that from me, though of course I've no idea how one introduces oneself that way. It isn't at all like exchanging names, is it? D'you mean to say you become one every so often? Well, we've something else in common after all, even if it is only a little bit."