Almost as he spoke there came a sound, from the pa.s.sage outside, that led him to slide his hand across the table--and to seize his revolver.

The visible presence of the little weapon rea.s.sured him; and, as a further sedative, he resorted to tobacco, filled and lighted his pipe, and leant back in the chair, blowing smoke rings towards the closed door.

He listened intently--and heard the sound again.

It was a soft _hiss_!

And now, he thought he could detect another noise--as of some creature dragging its body along the floor.

"A lizard!" he thought; and a memory of the basilisk eyes of Antony Ferrara came to him.

Both the sounds seemed to come slowly nearer and nearer--the dragging thing being evidently responsible for the hissing; until Cairn decided that the creature must be immediately outside the door.

Revolver in hand, he leapt across the room, and threw the door open.

The red carpet, to right and left, was innocent of reptiles!

Perhaps the creaking of the revolving chair, as he had prepared to quit it, had frightened the thing. With the idea before him, he systematically searched all the rooms into which it might have gone.

His search was unavailing; the mysterious reptile was not to be found.

Returning again to the study he seated himself behind the table, facing the door--which he left ajar.

Ten minutes pa.s.sed in silence--only broken by the dim murmur of the distant traffic.

He had almost persuaded himself that his imagination--quickened by the atmosphere of mystery and horror wherein he had recently moved--was responsible for the hiss, when a new sound came to confute his reasoning.

The people occupying the chambers below were moving about so that their footsteps were faintly audible; but, above these dim footsteps, a rustling--vague, indefinite, demonstrated itself. As in the case of the hiss, it proceeded from the pa.s.sage.

A light burnt inside the outer door, and this, as Cairn knew, must cast a shadow before any thing--or person--approaching the room.

_Sssf! ssf!_--came, like the rustle of light draperies.

The nervous suspense was almost unbearable. He waited.

_What_ was creeping, slowly, cautiously, towards the open door?

Cairn toyed with the trigger of his revolver.

"The arts of the West shall try conclusions with those of the East,"

he said.

A shadow!...

Inch upon inch it grew--creeping across the door, until it covered all the threshold visible.

Someone was about to appear.

He raised the revolver.

The shadow moved along.

Cairn saw the tail of it creep past the door, until no shadow was there!

The shadow had come--and gone ... but there was _no substance_!

"I am going mad!"

The words forced themselves to his lips. He rested his chin upon his hands and clenched his teeth grimly. Did the horrors of insanity stare him in the face!

From that recent illness in London--when his nervous system had collapsed, utterly--despite his stay in Egypt he had never fully recovered. "A month will see you fit again," his father had said; but?--perhaps he had been wrong--perchance the affection had been deeper than he had suspected; and now this endless carnival of supernatural happenings had strained the weakened cells, so that he was become as a man in a delirium!

Where did reality end and phantasy begin? Was it all merely subjective?

He had read of such aberrations.

And now he sat wondering if he were the victim of a like affliction--and while he wondered he stared at the rope of silk. That was real.

Logic came to his rescue. If he had seen and heard strange things, so, too, had Sime in Egypt--so had his father, both in Egypt and in London! Inexplicable things were happening around him; and all could not be mad!

"I'm getting morbid again," he told himself; "the tricks of our d.a.m.nable Ferrara are getting on my nerves. Just what he desires and intends!"

This latter reflection spurred him to new activity; and, pocketing the revolver, he switched off the light in the study and looked out of the window.

Glancing across the court, he thought that he saw a man standing below, peering upward. With his hands resting upon the window ledge, Cairn looked long and steadily.

There certainly was someone standing in the shadow of the tall plane tree--but whether man or woman he could not determine.

The unknown remaining in the same position, apparently watching, Cairn ran downstairs, and, pa.s.sing out into the Court, walked rapidly across to the tree. There he paused in some surprise; there was no one visible by the tree and the whole court was quite deserted.

"Must have slipped off through the archway," he concluded; and, walking back, he remounted the stair and entered his chambers again.

Feeling a renewed curiosity regarding the silken rope which had so strangely come into his possession, he sat down at the table, and mastering his distaste for the thing, took it in his hands and examined it closely by the light of the lamp.

He was seated with his back to the windows, facing the door, so that no one could possibly have entered the room unseen by him. It was as he bent down to scrutinise the curious plaiting, that he felt a sensation stealing over him, as though someone were standing very close to his chair.

Grimly determined to resist any hypnotic tricks that might be practised against him, and well a.s.sured that there could be no person actually present in the chambers, he sat back, resting his revolver on his knee. Prompted by he knew not what, he slipped the silk cord into the table drawer and turned the key upon it.

As he did so a hand crept over his shoulder--followed by a bare arm of the hue of old ivory--a woman's arm!

Transfixed he sat, his eyes fastened upon the ring of dull metal, bearing a green stone inscribed with a complex figure vaguely resembling a spider, which adorned the index finger.

A faint perfume stole to his nostrils--that of the secret incense; and the ring was the ring of the Witch-Queen!

In this incredible moment he relaxed that iron control of his mind, which, alone, had saved him before. Even as he realised it, and strove to recover himself, he knew that it was too late; he knew that he was lost!