“We thought perhaps he was looking for the Tombs of Gold,” remarked the professor casually, polishing his glasses.

Phalos gave a perceptible start.

“You’ve heard of the Tombs of Gold?” he asked, in a tone that he evidently tried to make careless.

“Oh, I know there’s a tradition that such tombs exist somewhere in Egypt,” replied Professor Bruce. “I don’t know whether there’s any truth in it or not.”

“Egypt is rich in treasure,” observed Phalos noncommittally. “In ancient days it stretched from the Euphrates to the headwaters of the Nile. Gold was brought in tribute to her kings from all parts of Africa and Asia. In the time of the Pharaohs her wealth was almost incalculable. Centuries have elapsed since then, but who shall say that some of that wealth does not remain either above or below her soil?”

“Then you believe that the Tombs of Gold really exist?” asked Don, his eyes shining.

“I did not say so,” replied Phalos. “It is possible that Mr. Sturdy thought so. He was certainly intent upon some definite object he had in mind. He was not going about at random. Especially was he interested in the Valley of the Kings. There he spent most of his time, working sometimes till far into the night.”

“It is reasonable to conclude, then, that he has now gone to the Valley of the Kings, do you think?” asked the captain.

“That is certainly where I would look for him first,” replied Phalos. “You will have to pass through Cairo to get there. My home is in that city, and I hope you will make it your headquarters during your stay.”

The friendship between Zeta Phalos and the members of the Sturdy party grew deeper as the voyage progressed. It soon became evident that the old Egyptian would prove invaluable to them when once they had landed and started on their search.