He can't tell if she's mocking him by giving him that extra bit of information, but he takes it all the same. Anything could be relevant. The day he stops asking is the day he's given up on fixing this, and that's just not going to happen. Forty-five years hadn't broken his resolve, two months isn't about to.

Nothing immediately stands out, but he doesn't admit at the lack of an epiphany. These things take time and he scrutinizes her a moment before he replies.

"I'm working on it." That is as polite an answer as he gives, even in his dry tone, so he must take her curiosity as genuine. It only occurs to him after how accepting she is to the possibility of time travel. "You seem to have adjusted to the idea pretty quickly."