out of the throat of the darkness came a stifled cry. It was the fighting rattle made by the strong man suddenly deprived of the power to breathe.
Again it came, and this time more loudly, with a ring of despair in it. In the dead silence it seemed to fill the whole house, but the walls were thick, and beyond the corridor there was no cognizance of anything being in the least wrong.
But the man in the blanket against the arras heard it and struggled to his feet. A long period of vivid personal danger had sharpened his senses. His knowledge of woodcraft enabled him to locate the cry to a yard.
"My father," he whispered; "I am only just in time."
He felt his way rapidly, yet noiselessly, along the few feet between his resting-place and Ravenspur's room. Imminent as the peril was, he yet paused to push his blanket out of sight. As he came to the door of Ravenspur's room the cry rose higher. He stooped and then his fingers touched something warm.
"Marion," he said; "I can catch the subtle fragrance of your hair."
The girl swallowed a scream. She was trembling from head to foot with fear and excitement. It was dark, the cry from within was despairing, the intense horror of it was dreadful.
"Yes, yes," she whispered hoarsely. "I was lying awake and I heard it. And that good old man told me to-day that his time was coming. I – I was going to rouse the house. The door is locked."
"Do nothing of the sort. Stand aside."
The voice was low but commanding. Marion obeyed mechanically. With great strength and determination Ralph flung himself against the door. At the second assault the rusty iron bolt gave and the door flew open.
Inside, Ravenspur lay on his bed. By his bedside a nightlight cast a feeble pallid ray. There was nobody in the room besides Ravenspur himself. He lay back absolutely rigid, a yellow hue was over his face like a painted mask, his eyes were wide open, his lips twitched convulsively. Evidently he was in some kind of cataleptic fit and his senses had not deserted him.
He was powerless to move and made no attempt to do so. The man was choking to death and yet his limbs were rigid. A sickly sweet odor filled the room and caused Ralph to double up and gasp for breath. It was as if the whole atmosphere was drenched with a fine spray of chloroform. Marion stood in the doorway like a fascinated white statue of fear and despair.
"What is it?" she whispered. "What is that choking smell?"
Ralph made no reply; he was holding his breath hard. There was a queer grinning smile on his face as he turned toward the window.
The fumbling clutching long hands rested for a moment on Ravenspur's forehead, and the next moment there was a sound of smashing glass, as with his naked fists Ralph beat in the lozenge-shaped windows.
A quick cool draught of air rushed through the room, and the figure on the bed ceased to struggle.
"Come in," said Ralph. "There is no danger now."
Marion entered. She was trembling from head to foot; her face was like death.
"What is it, what is it?" she cried. "Uncle Ralph, do you know what it is?"
"That is a mystery," Ralph replied. "There is some fiend at work here. I only guessed that the sickly odor was the cause of the mischief. You are better, sir?"
Ravenspur was sitting up in bed. The color had come back to his lips; he no longer struggled to breathe.
"I am all right," he said. His eyes beamed affectionately on Marion. "Ever ready and ever quick, child, you saved my life from that nameless horror."
"It was Uncle Ralph," said Marion. "I heard your cry, but Uncle Ralph was here as soon as I was. And it was a happy idea of his to break the window."
"It was that overpowering drug," said Ravenspur. "What it is and where it came from must always remain a mystery. This is a new horror to haunt me – and yet there were others who died in their beds mysteriously. I awoke to find myself choking; I was stifled by that sweet-smelling stuff; I could feel that my heart was growing weaker. But go, my child; you will catch your death of cold. Go to bed."
With an unsteady smile Marion disappeared. As she closed the door behind her, Ravenspur turned and grasped his son's wrist fiercely.
"Do you know anything of this?" he demanded. "You are blind, helpless; yet you were on the spot instantly. Do you know anything of this, I say?"
Ralph shook his head.
"It was good luck," he said. "And how should I know anything? Ah, a blind man is but a poor detective."
Yet as Ralph passed to his strange quarters, there was a queer look on his face. The long lean claws were crooked as if they were fastened about the neck of some enemy, some foe to the death.
"The hem of the mystery," he muttered. "Patience and prudence, and the day shall come when I shall have it by the throat, and such a lovely throat, too!"
CHAPTER IV
101 BRANT STREET
There was nothing about the house to distinguish it from its stolid and respectable neighbors. It had a dingy face, woodwork painted a dark red with the traditional brass knocker and bell-pull. The windows were hung with curtains of the ordinary type, the Venetian blinds were half down, which in itself is a sign of middle-class respectability. In the center of the red door was a small brass plate bearing the name of Dr. Sergius Tchigorsky.
Not that Dr. Tchigorsky was a medical practitioner in the ordinary sense of the word. No neatly appointed "pillbox" ever stood before 101; no patient ever passed the threshold.
Tchigorsky was a savant and a traveler to boot; a man who dealt in strange out-of-the-way things, and the interior of his house would have been a revelation to the top-hatted, frock-coated doctors and lawyers and City men who elected to make their home in Brant Street, W.
The house was crammed with curiosities and souvenirs of travel from basement to garret. A large sky-lighted billiard-room at the back of the house had been turned into a library and laboratory combined.
And here, when not traveling, Tchigorsky spent all his time, seeing strange visitors from time to time, Mongolians, Hindoos, natives of Tibet – for Tchigorsky was one of the three men who had penetrated to the holy city of Lassa, and returned to tell the tale.
The doctor came into his study from his breakfast, and stood ruminating, rubbing his hands before the fire. In ordinary circumstances he would have been a fine man of over six feet in height.
But a cruel misfortune had curved his spine, while his left leg dragged almost helplessly behind him, his hands were drawn up as if the muscles had been cut and then knotted up again.
Tchigorsky had entered Lassa five years ago as a god who walks upright. When he reached the frontier six months later he was the wreck he still remained. And of those privations and sufferings Tchigorsky said nothing. But there were times when his eyes gleamed and his breath came short and he pined for the vengeance yet to be his.
As to his face, it was singularly strong and intellectual. Yet it was disfigured with deep seams checkered like a chessboard. We have seen something like it before, for the marks were identical with those that disfigured Ralph Ravenspur and made his face a horror to look upon.
A young man rose from the table
