That vague outline which disturbed the square of the open window disappeared. A very soft thud which must have been inaudible to ears less keenly attuned than mine told me that the visitant, almost certainly the slayer of Van Berg, had dropped onto the floor and was now in the room with me!
I peered into the darkness left of the big, littered table. Something was approaching the bed...going, I thought, on all fours.
Definitely, the approaching was oblique—that is, not in my direction. I was conscious of a shock of relief. I had not been seen.
Something glittered dully in the reflected light, and I heard a faint swishing sound, almost the first, expecting the thud, which had betrayed the presence of this nocturnal assassin.
At first it puzzled me, and then, suddenly, to my mind an explanation sprang.
The creature was spraying the bed....
Ideas quickly associated themselves; for at this same moment there was swept to my nostrils an almost overpowering perfume of mimosa—the same that had haunted poor Van Berg’s room.
It was some unfamiliar but tremendously potent anaesthetic.
In the instant that realisation came to me, I knew also that the horrible visitor was not a supernatural creature but human. True, his agility was far above the ordinary, and his powers of silent movement were uncanny.
He was evidently armed with some kind of spray; and during the time that its curiously soothing sound continued, I found, so oddly does the mind react to indefinable fear, that my thoughts had wandered. I was thinking about an account I had once read of a mysterious creature known as Springheeled Jack, who terrorised outlying parts of London many years ago.
For the fact remained that this man, now endeavouring to reduce the occupant of the bed to unconsciousness, could apparently spring to high windows, quite beyond the reach of any human jumper, and indeed, beyond the reach of any member of the animal kingdom!
The swishing sound ceased. Absolute silence followed....
Peer intensely as I would, I could detect no trace of another presence in the room. But I knew exactly what was happening. The unimaginable man who had come through the window was crouching somewhere and listening. Probably he was counting, silently, knowing how many seconds must elapse before the unknown drug which smelled like mimosa could reduce the sleeper to unconsciousness—or, perhaps, bring about death....
Distant though I was from the bed, that sickly sweet odour was making me dizzy.
Fully a minute elapsed. No sound could I hear; nor could I detect a movement. But during that age-long minute I observed a vague white patch in the darkness, and presently I identified it. It was made by the initials painted on the green iron box.
And as I watched, this white patch became obscured.
A sound disturbed that all-but-insufferable silence—a sound of heavy breathing. Then, silhouetted against the window...I saw the intruder.
I saw a small, lithe body, muscular arms uplifted, the green box born upon the right shoulder.
My hand trembled upon the trigger, but Nayland Smith’s instructions had been definite. The man bore the box to the end of the room. Here, shadow from the cupboard swallowed him up. Preceded by very little noise the square outline of the box now appeared upon the top of the cupboard.
He had raised it above his head and placed it there, by which circumstances, since he appeared to be a small man, I was able to judge of his extraordinary strength.
My heart was beating very fast and I realised that I was holding my breath. I inhaled deeply, watching, now, the square of the opened window. A silhouetted arm appeared above the box, then a shoulder, and finally the whole of a lean body.
The midnight visitor was a Negro, or a member of some very dark race, wearing only a black loincloth: his features I could not see.
His movements interested me intensely. Stooping, he bent over the box. Certain metallic sounds told me that the iron handles at either end were being moved.
Then, as I watched...the box disappeared!
The black man alone, a crouching silhouette, remained outlined in the open window. The box had gone; incredible fact— but the box had gone! Silently, save for a distant thud that heavy iron chest had been “vanished” from the room as a conjurer vanishes a coin!
An interval followed, my reactions during which I cannot hope to describe, until presently I saw that the crouching figure was performing a sort of hauling movement. This movement ceased.
He stood suddenly upright...and disappeared.
CHAPTER ELEVENTH
THE
MAN
ON THE MINARET
That vague supernatural dread which latterly I had shaken off swept back again like a cloud, touching me coldly. The window space was perfectly blank, now. The iron box had gone; the black man had gone. This miracle had been achieved with scarcely any sound!
The legend of Spring-heeled Jack crossed my mind again. Then I was up. My period of enforced inactivity was ended.
I pressed the button of my torch and, springing out from behind the big trunk, directed a ray along the narrow room. The air was still heavy with a vague sickly perfume of mimosa;
but I gave no glance at the pillow which had been sprayed with this strange anaesthetic. The bed had been carefully prepared by Nayland Smith to produce the appearance of a sleeper.
“An old dodge of mine, Greville,” he had said, “which will certainly fail if the enemy suspects that I am here.”
Either the enemy did not suspect, or, like the ancient confidence trick, it was a device which age did not wither nor custom stale....
As though it had been a prearranged cue, that flash of light in the empty room heralded a sound—the sound...an indescribable humming which rose and rose, developed into a sort of wail, then died away like muted roaring....
I must explain at this point that from the moment of the figure’s disappearance from the window to that when, switching on the light, I ran forward, only a very few seconds had elapsed.
Leaping upon the low cupboard, and staring down into the street, I witnessed a singular spectacle.
That extraordinary sound, the origin of which had defied all speculation, was still audible, and since it seemed to come from somewhere high above my head, my first instinct was to look up.
I did not do so, however.
At the moment that I sprang into the open window, my glance was instantly drawn downward. I saw a figure—that of the black creature who had just quitted the room—apparently suspended in space, midway across the street!
His arms raised above his head, he was soaring upward towards a window of the Ghost Mosque!
“Good God!” I said aloud—”it isn’t human....”
There came a wild scream. The flying figure faltered—the upraised arms dropped—and he was dashed with a dull thud against the wall of the mosque, some eight feet below the window. From there he fell sheerly to the street below. A second, sickening, thud reached my ears...
The crack of a pistol, a sharp spurt of flame from the gallery of the minaret far above my head, drew my glance upward now. I saw a black-robed black-faced figure there, bathed in brilliant moonlight, bending over the rail and firing down upon the roof of the mosque below!
Once he fired, and moved further around the gallery. A second time. And then, as he disappeared from view, I heard the sound of a third shot....
Pandemonium awakened in the house about me.
Alt Mahmoud was unfastening the heavy bolt which closed the front door. Rima’s voice came from the landing above.