You see, the problem with subterranean dens is that they're full of vermin. Also, moisture is terrible for instruments.

"It's a banjo," he explains, shifting to give her a better look at the instrument (and totally poke it if she wants, he doesn't care). "They're traditional American instruments, kinda folksy." Which explains a little bit about what just happened back there with him and Guiteau.

He starts playing a tune, not putting words to it quite yet. "I have a few instruments back home - each of them takes something different."