“Where?”

“Outside the bazaar, in the crowd.”

“You did not—tell me.”

“I did not want to worry you.”

He laughed dryly.

“It doesn’t worry me, Eileen,” he said carelessly. “If I were in Damascus or Aleppo, it certainly might worry me to know that a man, no doubt actively malignant towards us, was near, perhaps watching; but Cairo is really a prosaically safe and law-abiding spot. We are as secure here as we should be at—Shepherd’s Bush, say!”

He laughed shortly. Voices floated out to them, nasal, guttural, strident; voices American, Teutonic, Gallic, and Anglo-Saxon. The orchestra played a Viennese waltz. Confused chattering, creaking, and bumping sounded from the river. Out upon the mud walls dogs bayed the moon.

But beyond the native village, beyond the howling dogs, beyond the acacia ranks out in the silver-grey mystery of the sands hard by, an outpost of the Pharaohs, where a ruined shrine of Horus bared its secret places to the peeping moon, the Sheikh of the Masr-Bishareen smiled.

Graham felt strangely uneasy, and sought by light conversation to shake off the gloom which threatened to claim him.