before Burwell's eyes the card she had prepared. A moment later, with a look of pity on her beautiful face, she rejoined me and we went away. It was plain he did not know us."

To so much of the savant's strange recital I had listened with absorbed interest, though without a word, but now I burst in with questions.

"What was your sister's idea in giving Burwell the card?" I asked.

"It was in the hope that she might make the man understand his terrible condition, that is, teach the pure soul to know its loathsome companion."

"And did her effort succeed?"

"Alas! it did not; my sister's purpose was defeated by the man's inability to see the pictures that were plain to every other eye. It is impossible for the kulos-man to know his own degradation."

"And yet this man has for years been leading a most exemplary life?"

My visitor shook his head. "I grant you there has been improvement, due largely to experiments I have conducted upon him according to my sister's wishes. But the fiend soul was never driven out. It grieves me to tell you, doctor, that not only was this man the Water Street assassin, but he was the mysterious murderer, the long-sought-for mutilator of women, whose red crimes have baffled the police of Europe and America for the past ten years."

"You know this," said I, starting up, "and yet did not denounce him?"

"It would have been impossible to prove such a charge, and besides, I had made oath to my sister that I would use the man only for these soul-experiments. What are his crimes compared with the great secret of knowledge I am now able to give the world?"

"A secret of knowledge?"

"Yes," said the savant, with intense earnestness, "I may tell you now, doctor, what the whole world will know, ere long, that it is possible to compel every living person to reveal the innermost secrets of his or her life, so long as memory remains, for memory is only the power of producing in the brain material pictures that may be projected externally by the thought rays and made to impress themselves upon the photographic plate, precisely as ordinary pictures do."

"You mean," I exclaimed, "that you can photograph the two principles of good and evil that exist in us?"

"Exactly that. The great 

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