“Nothing doing during the trip over or during the day in Pittsburg; but she learns the number of your berth as you buy it at the Pullman ticket office in Pittsburg, and she thinks she sees her chance. No one could have foreseen that that drunken fellow would have crawled into your berth.

“Now, I figure it out this way: She wanted those notes desperately—does still—not for Bronson, but to hold over his head for some purpose. In the night, when everything is quiet, she slips behind the curtains of lower ten, where the man’s breathing shows he is asleep. Didn’t you say he snored?”

“He did!” I affirmed. “But I tell you—”

“Now keep still and listen. She gropes cautiously around in the darkness, finally discovering the wallet under the pillow. Can’t you see it yourself?”

He was leaning forward, excitedly, and I could almost see the gruesome tragedy he was depicting.

“She draws out the wallet. Then, perhaps she remembers the alligator bag, and on the possibility that the notes are there, instead of in the pocket-book, she gropes around for it. Suddenly, the man awakes and clutches at the nearest object, perhaps her neck chain, which breaks. She drops the pocket-book and tries to escape, but he has caught her right hand.

“It is all in silence; the man is still stupidly drunk. But he holds her in a tight grip. Then the tragedy. She must get away; in a minute the car will be aroused. Such a woman, on such an errand, does not go without some sort of a weapon, in this case a dagger, which, unlike a revolver, is noiseless.

“With a quick thrust—she’s a big woman and a bold one—she strikes. Possibly Hotchkiss is right about the left-hand blow. Harrington may have held her right hand, or perhaps she held the dirk in her left hand as she groped with her right. Then, as the man falls back, and his grasp relaxes, she straightens and attempts to get away. The swaying of the car throws her almost into your berth, and, trembling with terror, she crouches behind the curtains of lower ten until everything is still. Then she goes noiselessly back to her berth.”

I nodded.

“It seems to fit partly, at least,” I said. “In the morning when she found that the crime had been not only fruitless, but that she had searched the wrong berth and killed the wrong man; when she saw me emerge, unhurt, just as she was bracing herself for the discovery of my dead body, then she went into hysterics. You remember, I gave her some whisky.