"To me," Ab Tabah whispered, "has been entrusted the task of guarding them; to you, I entrust that of guarding the possessions of the other guests!"

I started.

"But, my friend," I said, "this is a dreadful responsibility which you impose upon me."

"Other precautions are being taken," he replied calmly; "but you, observing great circ.u.mspection, can speak to the guests, and, being forewarned of his presence, can even watch for the coming of Omar of Ispahan."

II

The effect of my news upon Lady Collis was truly dramatic.

"Oh," she cried, "my rope of pearls. Mr. Chundermeyer only told me last week that it was worth at least two hundred pound more than I gave for it."

Mr. Chundermeyer had made himself popular with many of the ladies in the hotel by similar diplomatic means, but I think that if he had been compelled to purchase at his own flattering valuations Messrs. Isaacs and Chundermeyer would have been ruined.

"You need not wear it, my dear," said her husband tactlessly.

"Don't be so ridiculous!" she retorted. "You know I have brought my Queen of Sheba costume for to-morrow night."

That, of course, settled the matter, so that beyond making one pretty woman extremely nervous, my campaign against the dreaded Omar of Ispahan had opened--blankly. Later in the day I circulated my warning right and left, and everywhere sowed consternation without reaping any appreciable result.

"One naturally expects thieves on these occasions," said a little Chicago millionairess, "and if I only wore my diamonds when no rogues were about, I might as well have none. There are crooks in America I'd back against your Persian thief any day."

On the whole, I think, the best audience for my dramatic recitation was provided by Mr. Chundermeyer, whom I found in the American bar, just before the dinner hour. His yellow skin perceptibly blanched at my first mention of Omar Ali Khan, and one hand clutched at a bulging breast pocket of the dinner-jacket he wore.

"Good heavens, Mr. Kernaby," he said, "you alarm me--you alarm me, sir!"

"The reputation of Omar is not unknown to you?"

"By no means unknown to me," he responded in the thick, unctuous voice which betrayed the Semitic strain in his pedigree. "It was this man who stole the pair of blue diamonds from the Rajah of Bagore."

"So I am told."

"But have you been told that it was my firm who bought those diamonds for the Rajah?"

"No; that is news to me."

"It was my firm, Mr. Kernaby, who negotiated the sale of the blue diamonds to the Rajah; therefore the particulars of their loss, under most extraordinary circ.u.mstances, are well known to me. You have made me very nervous. Who is your informant?"

"A member of the native police with whom I am acquainted."

Mr. Chundermeyer shook his head lugubriously.

"I am conveying a parcel of rough stones to Amsterdam," he confessed, glancing warily about him over the rims of his spectacles, "and I feel very much disposed to ask for more reliable protection than is offered by your Egyptian friend."

"Why not lodge the stones in a bank, or in the manager's safe?"

He shook his head again, and proffered an enormous cigar.

"I distrust all safes but my own," he replied. "I prefer to carry such valuables upon my person, foolish though the plan may seem to you. But do you observe that squarely built, military looking person standing at the bar, in conversation with M. Balabas, the manager?"

"Yes; an officer, I should judge."

"Precisely; a _police_ officer. That is Chief Inspector Carlisle of New Scotland Yard."

"But he is a guest here."

"Certainly. The management sustained a severe loss last Christmas during the progress of a ball at which all Cairo was present, and as the inspector chanced to be on his way home from India, where official business had taken him, M. Balabas induced him to break his journey and remain until after the carnival."

"Wait a moment," I said; "I will bring him over."

Crossing to the bar, I greeted Balabas, with whom I was acquainted, and--

"Mr. Chundermeyer and I have been discussing the notorious Omar of Ispahan, who is said to be in Cairo," I remarked.

Inspector Carlisle, being introduced, smiled broadly.

"Mr. Balabas is very nervous about this Omar man," he replied, with a slight Scottish accent; "but, considering that everybody has been warned, I don't see myself that he can do much damage."

"Perhaps you would be good enough to rea.s.sure Mr. Chundermeyer,"

I suggested, "who is carrying valuables."

Chief Inspector Carlisle walked over to the table at which Chundermeyer was seated.

"I have met your partner, sir," he said, "and I gathered that you were on your way to Amsterdam with a parcel of rough stones; in fact, I supposed that you had arrived there by now."

"I am fond of Cairo during the Christmas season," explained the other, "and I broke my journey. But now I sincerely wish I were elsewhere."

"Oh, I shouldn't worry!" said the detective cheerily. "There are enough of us on the look-out."

But Mr. Chundermeyer remained palpably uneasy.

III

The gardens of the hotel on the following night presented a fairy-like spectacle. Lights concealed among the flower-beds, the bloom-covered arbors, and the feathery leaf.a.ge of the acacias, suffused a sort of weird glow, suggesting the presence of a million fire-flies. Up beneath the crowns of the lofty palms little colored electric lamps were set, producing an illusion of supernatural fruit, whilst the fountain had been magically converted into a cascade of fire.

In the ball-room, where the orchestra played, and a hundred mosque lamps bathed the apartment in soft illumination, a cosmopolitan throng danced around a giant Christmas tree, their costumes a clash of color to have filled a theatrical producer with horror, outraging history and linking the ages in startling fashion. Thus, St. Antony of the Thebaid danced with Salome, the luresome daughter of Herodias; Nero's arm was about the waist of Good Queen Bess; Charles II cantered through a two-step with a red-haired Vestal Virgin; and the Queen of Sheba (Daphne Collis) had no less appropriate a partner than Sherlock Holmes.

Doubtless it was all very amusing, but, personally, I stand by my commonplace dress-suit, having, perhaps, rather a ridiculous sense of dignity. Inspector Carlisle also was soberly arrayed, and we had several chats during the evening; he struck me as being a man of considerable culture and great shrewdness.

For Ab Tabah I looked in vain. Following our conservation on the previous afternoon, he had vanished like a figment of a dream. I several times saw Chundermeyer, who had elected to disguise himself as Al-Mokanna, the Veiled Prophet of Khora.s.san. He seemed to be an enthusiastic dancer, and there was no lack of partners.

But of these mandarins, pierrots, Dutch girls, monks, and court ladies I speedily tired, and sought refuge in the gardens, whose enchanted aspect was completed by that wondrous inverted bowl, jewel-studded, which is the nightly glory of Egypt. In the floral, dim-lighted arbors many romantic couples shrank from the peeping moon; but quiet and a hushful sense of peace ruled there beneath the stars more in harmony with my mood.

One corner of the gardens, in particular, seemed to be quite deserted, and it was the most picturesque spot of all. For here a graceful palm upstood before an outjutting _mushrabiyeh_ window, dimly lighted, over which trailed a wealth of bougainvillea blossom, whilst beneath it lay a floral carpet, sharply bisected by the shadow of the palm trunk. It was like some gorgeous ill.u.s.tration to a poem by Hafiz, only lacking the figure at the window.