"Now, what's that?" demanded he, pointing upward.
High on the cliff wall appeared a small, round protuberance. It was of the unmistakably red color of the other tombs; and Wallace, more excited than he had been in the cougar chase, said it was a sepulcher, and he believed it had never been opened.
From an elevated point of rock, as high up as I could well climb, I decided both questions with my glass. The tomb resembled nothing so much as a mud-wasp's nest, high on a barn wall. The fact that it had never been broken open quite carried Wallace away with enthusiasm.
"This is no mean discovery, let me tell you that," he declared. "I am familiar with the Aztec, Toltec and Pueblo ruins, and here I find no similarity. Besides, we are out of their latitude. An ancient race of people—very ancient indeed lived in this canyon. How long ago, it is impossible to tell."
"They must have been birds," said the practical Jones. "Now, how'd that tomb ever get there? Look at it, will you?"
As near as we could ascertain, it was three hundred feet from the ground below, five hundred from the rim wall above, and could not possibly have been approached from the top. Moreover, the cliff wall was as smooth as a wall of human make.
"There's another one," called out Jones.
"Yes, and I see another; no doubt there are many of them," replied Wallace. "In my mind, only one thing possible accounts for their position. You observe they appear to be about level with each other. Well, once the Canyon floor ran along that line, and in the ages gone by it has lowered, washed away by the rains."
This conception staggered us, but it was the only one conceivable. No doubt we all thought at the same time of the little rainfall in that arid section of Arizona.
"How many years?" queried Jones.