The hero, still with his back turned, drew his revolver and took careful aim by means of the mirror.
This had been a spot where for a moment he was troubled.

Instead of pointing the weapon over his shoulder, aiming by the mirror, he was directed to point it at the Mexican's reflection in the glass, and to fire at this reflection.

"It's all right," Baird assured him.

"It's a camera trick, see?
It may look now as if you were shooting into the mirror but it comes perfectly right on the film.

You'll see.