[The Doctor manages a small smile, shaky and weak as he strokes a hand through Oswin's hair.]

What do you think of...crystal waterfalls, hm? I never got around to seeing them myself but I've always wanted to. They say the sky is purple there, and the water is...so rich with minerals that it glistens like crystals.

[His voice shakes, but he manages to get it out. This is what he and Jenny did too.]