"'Now you see the demon-soul,' said my sister. 'Watch It writhe and struggle; it has served me well, brother, sayest thou not so, the lore I gained from our wise men?'
"The horror of what followed chilled my blood; nor would I trust my memory were it not that there remained and still remains plain proof of all that I affirm. This hideous creature, dwarfed, crouching, devoid of all resemblance to the man we had but now beheld, chattering to us in curious old-time French, poured out such horrid blasphemy as would have blanched the cheek of Satan, and made recital of such evil deeds as never mortal ear gave heed to. And as she willed my sister checked It or allowed It to go on. What it all meant was more than I could tell. To me it seemed as if these tales of wickedness had no connection with our modern life, or with the world around us, and so I judged presently from what my sister said.
"'Speak of the later time, since thou wast in this clay.'
"Then I perceived that the creature came to things of which I knew: It spoke of New York, of a wife, a child, a friend. It told of strangling the child, of robbing the friend; and was going on to tell God knows what other horrid deeds when my sister stopped It.
"'Stand as thou didst in killing the little babe, stand, stand!' and once more she spoke some words unknown to me. Instantly the demon sprang forward, and, bending Its clawlike hands, clutched them around some little throat that was not there,—but I could see it in my mind. And the look on its face was a blackest glimpse of hell.
"'And now stand as thou didst in robbing the friend, stand, stand'; and again came the unknown words, and again the fiend obeyed.
"'These we will take for future use,' said my sister. And bidding me watch the creature carefully until she should return, she left the room, and, after none too short an absence, returned bearing a black box that was an apparatus for photography, and something more besides,—some newer, stranger kind of photography that she had learned. Then, on a strangely fashioned card, a transparent white card, composed of many layers of finest Oriental paper, she took the pictures of the creature in those two creeping poses. And when it all was done, the card seemed as white as before, and empty of all meaning until one held it up and examined it intently. Then the pictures showed.
And between the two there was a third picture, which somehow seemed to show, at the same time, two faces in one, two souls, my sister said, the kindly visaged man we first had seen, and then the fiend.
"Now my sister asked for pen and ink and I gave her my pocket pen which was filled with purple ink. Handing this to the kulos-man she bade him write under the first picture: 'Thus I killed my babe.' And under the second picture: 'Thus I robbed my friend.' And under the third, the one that was between the other two: 'This is the soul of Richard Burwell.' An odd thing about this writing was that it was in the same old French the creature had used in speech, and yet Burwell knew no French.
"My sister was about to finish with the creature when a new idea took her, and she said, looking at It as before:—'Of all thy crimes which one is the worst? Speak, I command thee!'
"Then the fiend told how once It had killed every soul in a house of holy women and buried the bodies in a cellar under a heavy door.
"Where was the house?'
"'At No. 19 Rue Picpus, next to the old graveyard.'
"'And when was this?'
"Here the fiend seemed to break into fierce rebellion, writhing on the floor with hideous contortions, and pouring forth words that meant nothing to me, but seemed to reach my sister's understanding, for she interrupted from time to time, with quick, stern words that finally brought It to subjection.
"'Enough,' she said, 'I know all,' and then she spoke some words again, her eyes fixed as before, and the reverse change came. Before us stood once more the honest-looking, fine-appearing gentleman, Richard Burwell, of New York.
"'Excuse me, madame,' he said, awkwardly, but with deference; 'I must have dosed a little. I am not myself to-night.'
"'No,' said my sister, 'you have not been yourself to-night.'
"A little later I accompanied the man to the Continental Hotel, where he was stopping, and, returning to my sister, I talked with her until late into the night. I was alarmed to see that she was wrought to a nervous tension that augured ill for her health. I urged her to sleep, but she would not.
"'No,' she said, 'think of the awful responsibility that rests upon me.' And then she went on with her strange theories and explanations, of which I understood only that here was a power for evil more terrible than a pestilence, menacing all humanity.
"'Once in many cycles it happens,' she said, 'that a kulos-soul pushes itself within the body of a new-born child, when the pure soul waiting to enter is delayed. Then the two live together through that life, and this hideous principle of evil has a chance upon the earth. It is my will, as I feel it my duty, to see this poor man again. The chances are that he will never know us, for the shock of this night to his normal soul is so great as to wipe out memory.'
"The next evening, about the same hour, my sister insisted that I should go with her to the Folies Bergère, a concert garden, none too well frequented, and when I remonstrated, she said: 'I must go,—It is there,' and the words sent a shiver through me.
"We drove to this place, and passing into the garden, presently discovered Richard Burwell seated at a little table, enjoying the scene of pleasure, which was plainly new to him. My sister hesitated a moment what to do, and then, leaving my arm, she advanced to the table and dropped 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