"Nautilus, a rather beautiful name. A nautilus shell is complex and pearlescent on the inside. That world entity sounds a bit like the train, in that it's purpose is to defend other worlds. Did you leave deliberately, or did you just. . . find yourself elsewhere one day?"

Curufin smiled a little. "A good wish. It is hard to be separated from someone who is so important. You've spoken of your son before, and you obviously love him very much. I hope the same, that all parents and children who are so bonded may meet again."