“It is true that now I also see but three. Yet there were four,” he added obstinately.

Presently the climbers began to descend, following one another down the eastern face. At length they reached the ground safely, and having donned their robes, came to Khian, bowing, and asked him whether he were now satisfied that the pyramids could be climbed.

“I am satisfied that this pyramid can be climbed, though of the others I know nothing,” he answered. “Yet before I give you the reward you have earned so well, tell me, Captain, how it comes about that you and your sons, who were three at its base, became four upon its crest?”

“What does my Lord mean?” asked the Sheik gravely.

“What I say, Captain; neither more nor less. When you stood upon the top yonder, with the three of you was a fourth, a slender figure clad in white. I swear it by all the gods.”

“It may be so,” answered the Sheik imperturbably, “only then, as we saw no one, it must have been given to my Lord to perceive the Spirit of the Pyramids herself who accompanied us, invisible to our eyes. Had this chanced when the full moon shines, it would not have been so wonderful, since then she is apt to wander, or so it is reported, but that he should have seen her in the light of day is most strange and portends we know not what.”

Now Khian began to ply the man and his sons with questions about this Spirit of the Pyramids and whether she would be visible if they came to look for her when the full moon shone, but from them learned nothing, since to every question they answered that they did not know. Next he inquired of them whether they would teach him how to climb the pyramids as they did, if he paid them well. They replied that except by order of the Council they would not, because the business was very dangerous, and if aught happened to him, his blood would be on their hands. So in the end he made them a large present, for which they thanked him with many bows, and, just as the sun began to set, departed back to the temple.

As they went side by side, Khian, who was lost in thought and wonder, heard Ru mutter:

“A second whom the gods have smitten with the desire to climb the pyramids. Who could have believed that there were two such mad people in the world? What does it mean? Surely such folly must have a meaning, for among my people, the Ethiopians, they say that the maddest are always the most inspired.”

Twice or thrice he muttered thus, till at last Khian asked him suddenly: