Go on, aim carefully, right smack at that looking-glass--fire!" Still somewhat doubting, Merton fired.

The mirror was shattered, but a dozen feet back of him the treacherous Mexican threw up his arms and fell lifeless, a bullet through his cowardly heart.

It was a puzzling bit of trick-work, he thought, but Baird of course would know what was right, so the puzzle was dismissed.

Buck Benson, silent man of the open, had got the scoundrel who would have played him false.
A thrilling struggle ensued between Merton and the hellhound of justice.
Perceiving who had slain his would-be informant, the detective came to confront Merton.

Snatching off his cap and mustache he stood revealed as the man who had not dared to arrest him at the scene of his crime.