Then, for I am not entirely devoid of conscience, it occurred to me that I had a duty,—that it was incumbent upon me to report to somebody. I thought of the police, but was it right to call them when I had so vague a report to make? What could I tell them? That I had seen shadows fighting? Heard a woman scream? Smelled smoke? Heard the report of a pistol? A whimsical thought came that the report of the pistol was the only definite report I could swear to!

Yet the whole scene was definite enough to me.

I had seen two men fighting,—shadows, to be sure, but shadows of real men. I had heard their voices raised in dissension of some sort, I had seen a scuffle and had heard a shot, of which I had afterward smelled the smoke, and,—most incriminating of all,—I had heard a woman’s scream. A scream, too, of terror, as for her life!

And then, I had immediately entered these rooms, and I had found them empty of all human presence, but with the smoke still hanging low, to prove my observations had been real, and no figment of my imagination.

I believed I had latent detective ability. Well, surely here was a chance to exercise it!

What more bewildering mystery could be desired than to witness a shooting, and, breaking in upon the scene, to find no victim, no criminal, and no weapon!

I hunted for the pistol, but found no more trace of that than of the hand that had fired it.

My brain felt queer; I said to myself, over and over, “a fight, a shot, a scream! No victim, no criminal, no weapon!”

I looked out in the hall again. I had already looked out two or three times, but I had seen no one. However, I didn’t suppose the villain and his victim had gone down by the elevator or by the stairway.

But where were they? And where was the woman who had screamed?