As I did so something whistled past my ear, so closely as almost to touch it--and struck with a dull thud upon the wall beyond!

"Bristol!" I whispered.

But as I raised my eyes to him he seemed to crumple up, and fell loosely forward into the patch of moonlight spread upon the floor!

"G.o.d in heaven!" I said aloud.

In a cold sweat of fear I crouched there, for it had become evident to me that, as I bent, I was entirely in shadow.

There was a rustling in the bushes on the left; but before I could turn in that direction, my attention was claimed elsewhere. Over into the loggia leapt an almost naked brown figure!

It was that of a small but strongly built man, who carried a short, exceedingly thick bamboo rod in his hand. My fear was too great to admit of my accurately observing anything at that time, but I noticed that some kind of leather thong or loop was attached to the end of the squat cane.

The panic fear of the supernatural was strongly upon me, and I was unable to realize that this Eastern apparition was a creature of flesh and blood. With my nerves strung up to snapping point, I crouched watching him. He entered the room, bending over the body of Bristol.

A hot breath fanned my cheek!

At that my overwrought nerves betrayed me. I uttered a stifled cry, looking upward ... and into a pair of gleaming eyes which looked down into mine!

A second brown man (who must have entered by one of the windows overlooking the shrubbery) was bending over me!

Scarce knowing what I did, I raised my revolver and blazed straight into the dimly-seen face. Down upon me silently dropped a naked body, and something warm came flowing over my hand. But, knowing my foes to be of flesh and blood, feeling myself at handgrips now with a palpable enemy, I threw off the body, leapt up and fired, though blindly, at the flying shape that flashed across the loggia--and was lost in the shadow pools under the elms.

Upon the din of my shooting fell silence like a cloak. A moment I listened, tense, still; then I turned to the table and lighted the lamp.

In its light I saw Bristol lying like a dead man. Close beside him was a big and heavy lump of clay. It had been shaped as a ball, but now it was flattened out curiously. Bending over my unfortunate companion and learning that, though unconscious, he lived, I learnt, too, how the Hashishin contrived to strike men insensible without approaching them; I learnt that the one whom I had shot, who lay in his blood almost on the spot where Professor Deeping once had lain, was an expert slinger.

The contrivance which he carried, as did the other who had escaped, was a sling, of the ancient Persian type. In place of stones, heavy lumps of clay were used, which operated much the same as a sand-bag, whilst enabling the operator to work from a considerable distance.

Hidden, over by the ancient chapel it might be, one of this evil twain had struck down Morris, the constable; from the shelter of the trees, from many yards away, they had shot their singular missiles through the open windows at Bristol and myself. Bristol had succ.u.mbed, and now, with a redness showing through his close-cut hair immediately behind the right ear, lay wholly unconscious at my feet.

It had been a divine accident which had caused me to drop my revolver, and, stooping to recover it, unknowingly to frustrate the design of the second slinger upon myself. The light of the lamp fell upon the face of the dead Hashishin. He lay forward upon his hands, crouching almost, but with his face, his dreadful, featureless face, twisted up at me from under his left shoulder.

G.o.d knows he deserved his end; but that mutilated face is often grinning, bloodily, in my dreams.

And then as I stood, between that horrid exultation which is born of killing and the panic which threatened me out of the darkness, I saw something advancing ... slowly ... slowly ... from the elmen shades toward the loggia.

It was a shape--it was a shadow. Silent it came--on--and on.

Where the dusk lay deepest it paused, undefined; for I could give it no name of man or spirit. But a horror seemed to proceed from it as light from a lamp.

I groped about the table near to me, never taking my eyes from that sinister form outside. As my fingers closed upon the telephone, distant voices and the sound of running footsteps (of those who had heard the shots) came welcome to my ears.

The form stirred, seeming to raise phantom arms in execration, and a stray moonbeam pierced the darkness shrouding it. For a fleeting instant something flashed venomously.

The sounds grew nearer. I could tell that the newcomers had found Morris lying at the gate. Yet still I stood, frozen with uncanny fear, and watching--watching the spot to which that stray beam had pierced; the spot where I had seen the moon gleam upon the ring of the Prophet!

CHAPTER X

AT THE BRITISH ANTIQUARIAN MUSEUM

A little group of interested spectators stood at the head of the square gla.s.s case in the centre of the lofty apartment in the British Antiquarian Museum known as the Burton Room (by reason of the fact that a fine painting of Sir Richard Burton faces you as you enter). A few other people looked on curiously from the lower end of the case. It contained but one exhibit--a dirty and dilapidated markoob--or slipper of morocco leather that had once been red.

"Our latest acquisition, gentlemen," said Mr. Mostyn, the curator, speaking in a low tone to the distinguished Oriental scholars around him. "It has been left to the Inst.i.tution by the late Professor Deeping. He describes it in a doc.u.ment furnished by his solicitor as one of the slippers worn by the Prophet Mohammed, but gives us no further particulars. I myself cannot quite place the relic."

"Nor I," interrupted one of the group. "It is not mentioned by any of the Arabian historians to my knowledge--that is, if it comes from Mecca, as I understand it does."

"I cannot possibly a.s.sert that it comes from Mecca, Dr. Nicholson,"

Mostyn replied. "The Professor may have taken it from Al-Madinah--perhaps from the mysterious inner pa.s.sage of the baldaquin where the treasures of the place lie. But I can a.s.sure you that what little we do know of its history is sufficiently unsavoury."

I fancied that the curator's tired cultured voice faltered as he spoke; and now, without apparent reason, he moved a step to the right and glanced oddly along the room. I followed the direction of his glance, and saw a tall man in conventional morning dress, irreproachable in every detail, whose head was instantly bent upon his catalogue. But before his eyes fell I knew that their long almond shape, as well as the peculiar burnt pallor of his countenance, were undoubtedly those of an Oriental.

"There have been mysterious outrages committed, I believe, upon many of those who have come in contact with the slipper?" asked one of the savants.

"Exactly. Professor Deeping was undoubtedly among the victims.

His instructions were explicit that the relic should be brought here by a Moslem, but for a long time we failed to discover any Moslem who would undertake the task; and, as you are aware, while the slipper remained at the Professor's house attempts were made to steal it."

He ceased uneasily, and glanced at the tall Eastern figure. It had edged a little nearer; the head was still bowed and the fine yellow waxen fingers of the hand from which he had removed his glove fumbled with the catalogue's leaves. It may well have been that in those days I read menace in every eye, yet I felt a.s.sured that the yellow visitor was eavesdropping--was malignantly attentive to the conversation.

The curator spoke lower than ever now; no one beyond the circle could possibly hear him as he proceeded--

"We discovered an Alexandrian Greek who, for personal reasons, not unconnected with matrimony, had turned Moslem! He carried the slipper here, strongly escorted, and placed it where you now see it.

No other hand has touched it." (The speaker's voice was raised ever so slightly.) "You will note that there is a rail around the case, to prevent visitors from touching even the gla.s.s."

"Ah," said Dr. Nicholson quizzically, "And has anything untoward happened to our Graeco-Moslem friend?"

"Perhaps Inspector Bristol can tell," replied the curator.

The straight, military figure of the well-known Scotland Yard man was conspicuous among the group of distinguished--and mostly round-shouldered--scholars.

"Sorry, gentlemen," he said, smiling, "but Mr. Acepulos has vanished from his tobacco shop in Soho. I am not apprehensive that he had been kidnapped or anything of that kind. I think rather that the date of his disappearance tallies with that on which he cashed his cheque for service rendered! His present wife is getting most unbeautifully fat, too."

"What precautions," someone asked, "are being taken to guard the slipper?"

"Well," Mostyn answered, "though we have only the bare word of the late Professor Deeping that the slipper was actually worn by Mohammed, it has certainly an enormous value according to Moslem ideas. There can be no doubt that a group of fanatics known as Hashishin are in London engaged in an extraordinary endeavour to recover it."

Mostyn's voice sank to an impressive whisper. My gaze sought again the tall Eastern visitor and was held fascinated by the baffled straining in those velvet eyes. But the lids fell as I looked; and the effect was that of a fire suddenly extinguished. I determined to draw Bristol's attention to the man.

"Accordingly," Mostyn continued, "we have placed it in this room, from which I fancy it would puzzle the most accomplished thief to remove it."

The party, myself included, stared about the place, as he went on to explain--

"We have four large windows here; as you see. The Burton Room occupies the end of a wing; there is only one door; it communicates with the next room, which in turn opens into the main building by another door on the landing. We are on the first floor; these two east windows afford a view of the lawn before the main entrance; those two west ones face Orpington Square; all are heavily barred as you see. During the day there is a man always on duty in these two rooms. At night that communicating door is locked. Short of erecting a ladder in full view either of the Square or of Great Orchard Street, filing through four iron bars and breaking the window and the case, I fail to see how anybody can get at the slipper here."

"If a duplicate key to the safe--" another voice struck in; I knew it afterward for that of Professor Rhys-Jenkyns.