“No,” said Poirot, shaking his head, “into that of the Dr. Ames.”

The doctor stared at him incredulously; then, repeating Dr. Tosswill’s words, he cried:

“Some one is hoaxing us. Come, we’ll soon catch the fellow.”

He dashed energetically in pursuit of the shadowy apparition. I followed him, but, search as we would, we could find no trace of any living soul having passed that way. We returned, somewhat disturbed in mind, to find Poirot taking energetic measures, in his own way, to ensure his personal safety. He was busily surrounding our tent with various diagrams and inscriptions which he was drawing in the sand. I recognized the five-pointed star or Pentagon many times repeated. As was his wont, Poirot was at the same time delivering an impromptu lecture on witchcraft and magic in general, White Magic as opposed to Black, with various references to the Ka and the Book of the Dead thrown in.

It appeared to excite the liveliest contempt in Dr. Tosswill, who drew me aside, literally snorting with rage.

“Balderdash, sir,” he exclaimed angrily. “Pure balderdash. The man’s an impostor. He doesn’t know the difference between the superstitions of the Middle Ages and the beliefs of Ancient Egypt. Never have I heard such a hotch-potch of ignorance and credulity.”

I calmed the excited expert, and joined Poirot in the tent. My little friend was beaming cheerfully.

“We can now sleep in peace,” he declared happily. “And I can do with some sleep. My head, it aches abominably. Ah, for a good tisane!”

As though in answer to prayer, the flap of the tent was lifted and Hassan appeared, bearing a steaming cup which he offered to Poirot. It proved to be camomile tea, a beverage of which he is inordinately fond. Having thanked Hassan and refused his offer of another cup for myself, we were left alone once more. I stood at the door of the tent some time after undressing, looking out over the desert.

“A wonderful place,” I said aloud, “and a wonderful work. I can feel the fascination. This desert life, this probing into the heart of a vanished civilization. Surely, Poirot, you, too, must feel the charm?”