RE: The Traveler
I can't think of one way this would be better. I was curating for Ink Well when I read this and had to come over and express my own opinion.
Every word carefully chosen. At first I thought Clark might be an alter ego for Simon. He's so alone and he does bring up hallucinating. Also, two sides of the same person, the optimist and the pessimist.
However, it doesn't seem you intend this interpretation. Doesn't matter. Story works great. Just wonderful.