“We know only too well that all over the world, from wayward undergraduate to B. B. C. producer to publisher's reader there are people, otherwise sensible and sane, people who would not believe in six-headed cats and blood-curdling spectral monsters, who yet read some folly about Noah's ark or Atlantis or cataclysmic world-tides, and say, with a contented sigh, "There may be something in it, you know."”