“Subterfuge was permitted by the Prophet, (on whom be peace),” he continued; “but not lying! My sister is the daughter of the Mudîr el-Fáyûm.”

It was a rebuke, perhaps a merited one; and I accepted it in silence. Although, from the moment that I had first set eyes on him, I had never doubted Abû Tabâh to be a man of good family, this modest avowal was something of a revelation.

“Her presence here, which was permitted by my father,” he said, “was a trap; for it is well known throughout the Moslem world that she is the possessor of costly ornaments. The trap succeeded. Omar of Ispahân, at great risk of discovery, remained to steal her jewels, although he had already amassed a choice collection.”

Someone had begun to bang upon the bolted door, and there was an excited crowd beneath the window.

“You supposed, no doubt,” the imám resumed calmly, “that I suspected Major Redpath and M. Balabas, as well as Mr. Chundermeyer and the English detective? It was not so. But I regarded the room of M. Balabas as excellently situated for Omar’s purpose, and I knew that M. Balabas rarely retired earlier than one o’clock. Even more suitable was that of Major Redpath, whose illness I believe to have been due to some secret art of Omar’s.”

“But he is down with chronic malaria!”

“It may even be so; yet I believe the attack to have been induced by Omar of Ispahân.”

“But why?”

“Because, as I learned to-night, Major Redpath is the only person in Cairo who has ever met Mr. Chundermeyer! I will confess that until less than an hour ago I did not know if Inspector Carlisle was really an inspector! Oh, it is a seeming absurdity; but Omar of Ispahân is a wizard! Therefore I entered the inspector’s room, and found him to be still unconscious. Major Redpath was in deep slumber, and Omar had entered and quitted his room without disturbing him. I did likewise, and visited Mr. Chundermeyer’s—the door was ajar—on my way downstairs.”