Time and Again

Si Morley is marking time: he's bored with his job as a commercial artist, and his social life doesn't seem to be going anywhere. So when he's approached by an affable ex-football star and told that he's just what the government is looking for to be part of a a top secret project, he doesn't hesitate for long. And one night he steps out of his twentieth-century New York apartment into the winter of 1882, and finds a kind of Eden.
Or does he?