Steve found the mirror in the great northwestern desert. It was lying half-buried in the sand, and the wind howled in fury over it, and when he bent to pick it up the sun smote him like a shining blade, dividing his tall body into blinding light and wavering shadow. I knew it was a Martian mirror before he straightened. The craftsmanship was breathtaking and could not have been duplicated on Earth. It was shaped like an ordinary hand mirror; but its glass surface was like a lake of fire, with de