"'The hound,'
"I told him I hadn't seen a thing, but I heard the noise all right. Between you and me, though, I did think I saw a white flash for a second beside his bed, but I can't swear to it."
"We won't trust our eyes tonight," said the doctor, "I have three eyes in that case that will not be affected by hysteria or register hallucinations."
"Three eyes? What are you talking about?
"Cameras, of course."
"But how—"
"Wait until we get there. I'll show you."
A few moments later they were admitted to the apartment by the housekeeper, a stolid woman of sixty or thereabout. Ritsky presented them to his niece, a dreamy-eyed, delicately pretty school girl with silky golden curls that glistened against the pale whiteness of her skin.
"If you don't mind," said the doctor, "we will look things over now. It will take some time to install the wiring and make other necessary preparations."
Ritsky showed them through the apartment, which was roomy, furnished in good taste and artistically decorated. The floor plan was quite simple and ordinary. First came the large living-room that extended across the front of the house. This opened at the right into the dining-room and at the center into a hallway which led through to the back of the building. Behind the dining-room was the kitchen, and behind that the servant's room. Ritsky's bedroom was directly across the hall from the dining-room. Then came his niece's bedroom, a spare bedroom and a bathroom. Each of the three front bedrooms was equipped with a private bath and large clothes-closet.
The doctor began by installing the three cameras in Ritsky's room, fastening them on the wall in such a manner that they faced the bed from three directions. After focusing them properly, he set the flash-gun on a collapsible tripod and pointed it toward the bed.
The room was lighted by an alabaster bowl that depended from the ceiling and could be turned on or off by a switch at the bedside. There were, in addition, two wall lights, one on each side of the dresser, and a small reading lamp on a table in one corner. These last three lights were operated by individual pull-cords.
Ritsky procured a step-ladder for him, and, after switching off the drop light, he removed one of the bulbs from the cluster and inserted a four-way socket. From this socket he ran wires along the ceiling and down the wall to the three cameras and the flash-gun. By the time these preparations were completed Miss Rogers and the housekeeper had retired.
Hoyne surveyed the finished job with frank admiration.
"If there's anything in this room when Ritsky turns the switch those three mechanical eyes will sure spot it," he said enthusiastically,
"Now, Mr. Ritsky," began the doctor, "I want you to place yourself entirely in our hands for the night. Keep cool, fear nothing, and carry out my instructions to the letter. I suggest that you go to bed now and endeavor to get some sleep. If the apparition troubles you, do just as you have done in the past—turn on the light. Do not, however, touch the light switch unless the thing appears: The photographic plates, when developed, will tell whether you have been suffering from a mere hallucination induced by auto-suggestion or if genuine materialization phenomena have occurred."
After closing and bolting the windows they placed the step-ladder in the hallway beside Ritsky's door. Then they obtained a duplicate key from him and asked him to lock himself in, removing his key so they might gain entrance at any time.
When everything was ready they quietly brought two chairs into the hall from the spare bedroom and began their silent vigil.
III.
BOTH MEN sat in silence for nearly three hours. The doctor seemed lost in thought, and Hoyne nervously masticated his inevitable unlighted cigar. The house was quiet, except for the ticking of the hall clock and its hourly chiming announcements of the flight of time.
Shortly after the clock struck two they heard a low, scarcely audible moan.
"What was that?" whispered the detective, hoarsely.
"Wait!" the doctor replied.
Presently it was repeated, followed by prolonged sobbing.
"It's Miss Rogers," said Hoyne, excitedly.
Doctor Dorp rose and softly tiptoed to the door of the child's bed chamber. After listening there for a moment he noiselessly opened the door and entered. Presently he returned, leaving the door ajar. The sobbing and moaning continued.
"Just as I expected," he said. "I want you to go in the child's room, keep quiet, and make a mental note of everything you see and hear. Stay there until I call you, and be prepared for a startling sight."
"Wh—what is it?" asked Hoyne, nervously.
"Nothing that will hurt you. What's the matter? Are you afraid?"
"Afraid, hell!" growled Hoyne. "Can't a man ask you a question—"
"No time to answer questions now. Get in there and do as I say if you want to be of any assistance."
"All right, Doc. It's your party."
The big detective entered the room of the sobbing child and squeezed his great bulk into a dainty rocking chair from which he could view her bed. She tossed from side to side, moaning as if in pain, and Hoyne, pitying her, wondered why the doctor did not awaken her.
Presently she ceased her convulsive movements, clenched her hands, and uttered a low, gurgling cry, as a white, filmy mass slowly emerged from between her lips. The amazed detective stared with open mouth, so frightened that he forgot to chew his cigar. The filmy material continued to pour forth for several minutes that seemed like hours to the tense watcher. Then it formed a nebulous, wispy cloud above the bed, completely detached itself from the girl, and floated out through the half-opened door.
"Doctor Dorp, standing in the hallway, saw a white, misty thing of indefinite outline emerge from the bedroom. It floated through the hall and paused directly in front of Ritsky's door. He approached it cautiously and noiselessly, and noticed that it grew rapidly smaller. Then he discovered the reason. It was flowing through the keyhole!
In a short time it had totally disappeared. He waited breathlessly.
What was that? The whining cry of a hound broke the stillness! He mounted the step-ladder in order to view the interior of the room through the glass transom. He had scarcely placed his foot on the second step when the whining noise changed to a gurgling growl that was followed by a shriek of mortal terror and the dull report of the flash-gun.
Leaping down from the ladder, the doctor called Hoyne, and they entered the "haunted" bed chamber. The room was brilliantly lighted by the alabaster bowl and filled with the sickening fumes of flash-powder.
Hoyne opened the windows and returned to where the doctor was thoughtfully viewing Ritsky, who had apparently fainted. He had fallen half out of bed, and hung there with one bony arm trailing and his emaciated face a picture of abject fear.
