It doesn't surprise her that it piques his interest-- even if it's just a piece of trivia, it's trivia he didn't figure out on his own. And privately, she rather likes even that moment of having the upper hand. People might call him Spooky, but no one disagrees that Fox Mulder is pretty brilliant; she could tell he thought he had her wholly figured out from the beginning, so it's nice to have a card up her sleeve, no matter how unimportant.

"1979?"

The memories of Craiger are... difficult, to say the least, but distant enough that she can talk about it. At least some of it. In spite of herself, she feels a smile tugging at the corner of her lips.