As Swann listens, watches, feels, a smile spreads over his face.

"I can do tha'," he says, and his fingers find the notes. It's nothing he's played before, and if he's heard it, he doesn't remember, but it feels right. The starts quietly, building in volume and pace as he begins to walk again.

He's humming, not quite yet to any words yet. Can you hear it, Doctor?