John was shocked all right. A number of possibilities had crossed his mind, but time travel hadn't been among them. It was completely impossible, things like that simply didn't happen. But her mannerisms mostly verified it, and there had been a slight undercurrent of uneasiness about those that didn't corroborate it, hadn't there? He stared at her and realized he was staring. "It's 2010," he said slowly. "And... either your Jim and the one I met are not the same or he's a very good liar, because he claimed to know me back home."
His gaze had wandered past her now, his brow furrowed as he thought. "Sherlock. And Jim. They remember a time past me. I thought I'd lost two months, that something had happened to my memory. Perhaps nothing's happened to me after all, except coming here." He still didn't know how that was possible, but the idea that there was nothing mentally wrong with him was a relief. He'd grasp at that straw, however ridiculous it was.
He focused back on Elizabeth and he frowned again, but this time concern was evident on his face. "I haven't said anything rude, have I? I'm not really well-versed on 19th century etiquette, but I know it was all much more strict back then."