What a weapon for such a deed! Was ever more outlandish instrument used with murderous intent? The entire bracket could easily be detached from the fender, and would, no doubt, inflict a terrible blow. But why seize this clumsy device when it actually supported a heavy brass poker?

The thing savored of madness, of the wild vagary of a homicidal maniac. It was incomprehensible, strange beyond belief.

Yet as Bruce pictured the final scene in that tragedy, as he saw the ill-fated lady stagger helplessly to the ground before a treacherous and crushing stroke, a fierce light leaped into his face, and his lips set tight with unflinching purpose.

Had Mensmore been within reach at that moment he would assuredly have been lodged in a felon’s cell forthwith. No excuse, no palliation, would be accepted. The man who could so foully slay a gentle, kindly, high-minded woman deserved the utmost rigor of the law, no matter what the circumstances that led to the commission of the crime.

It was not often that Bruce allowed impulse to master reason so utterly.

In strange altruistic mood he asked himself why he did not spring from his chair, and, tearing the bracket from its supports, exhibit it to his fellow-worker, while he gave, in a few passionate sentences, the information that would set the French police to scour the Mediterranean littoral until they found the White Heather. Of what matter to him was the suffering of a sister or sweetheart? Did the man who killed Lady Dyke reck of these things? Yes, he would do it—

But a cry of triumph from the detective arrested the fateful words even as they trembled on his lips. “Here’s a find!” was the shout. “Thinking is all very well, Mr. Bruce, but hard work is better. What do you make of that?”

“That” was a letter, which, in the manner known to many a puzzled householder, had slipped down behind a drawer in the cabinet, to be crushed against the wardrobe at the back, and lie there forgotten and unnoticed.

Even in his perturbed state the barrister could not help glancing at the crumpled document, first noting the date, October 15th of the year just closed, with the superscription, “Mountain Butts, Wyoming.” There was no envelope.

It was addressed to “Dear Bertie,” and ran as follows: