She appeared utterly unaware of our presence. There was a dramatic intensity in her voice and gestures which thrilled even me, although I had attended some hypnotic experiments in London and was aware of the complete realism with which a somnambulist will play a part suggested to him. I had no doubt whatever that she was in a state of hypnosis, accidentally self-induced, and that she was merely acting on the suggestions of the talk she had overheard.

Her mother, however, had no such consoling certitude. She hid her face in her hands, groaning: “She is possessed! She is possessed! Oh, God, cast out the evil spirit! cast out the evil spirit!”

Geoffrey was white to the lips, appalled, unable to utter a sound. The old man stared at her, fascinated, a strange gleam in his eyes.

The mother turned to me in despair.

“Oh, doctor! Do something—do something!—Oh, if only we had a minister here! She is possessed by an evil spirit! My Pauline! My Pauline!” She sank on her knees by one of the swivel-chairs, gave herself up to agonized prayers. “Oh, God, cast out the evil one! Oh, God, cast out the evil one!”

Thinking that this strange incident had already lasted more than long enough, I took a step toward the girl with a vague idea (though I didn’t quite know how) of breaking the hypnosis. She stood looking upward still, with a wheedling, diabolical smile, into apparent nothingness.

“We will go together—we two—with the treasure, say, John Dawson?” she murmured seductively, the very incarnation of a Delilah. “Mansvelt is dead—we will run away from Simon and go with my people before they kill us all—they are very many and you can only hold out two-three days—but we might take the treasure, John Dawson, the treasure you and Simon hid with Mansvelt—Simon, we will kill him—and we will go away and be rich—rich, John Dawson—say?” Her voice was perfidiously honeyed, her eyes glistened, as she caressed that uncanny empty air.

“What is she talking about?” muttered Geoffrey in a low, excited voice. “Who are these people—Mansvelt and Simon? Have you heard of them, doctor?”

I shook my head. They were utterly unknown to me. For a moment I hesitated, fascinated by the little drama, curious to hear more.

The mother moaned.