River's was another voice he'd come to recognize quickly, mostly because it had a sort of sing-song quality to it. And occasionally was a little childlike. Of course, no one else said the stuff she did, and that helped too.

He shifted in the booth to look for her, then frowned, brows furrowing, when he didn't see her. Since he could still here her, he lifted himself enough to look over the booth and still didn't see her. "River?" he called quietly as he got up from his own seat and went over to look in the only likely place. Looking at her upside down and smiling quixotically at her, he asked, "What are you counting?"