Or something in another language, picked up by his travels. I had him refer to Barjavel's <i>La nuit des temps</i>, and I could see him connecting to that. Someone brought out of her own advanced world and having difficulty fitting in here, true requited love.... In a lot of ways, Clark's in the same position, but reversed -- he does have the trouble fitting in, but he doesn't remember where he's from; he found his true love here rather than leaving it behind.
