"We have hunted high and low through this series of ratholes, and without any success," observed Eugene, beginning to bite off his words, as though unable to much longer keep up the pretense of being calm. "What have you done with that old Moqui who came up here ahead of us?"
"Ah! you saw him enter the hidden stairway, then, and that was how you learned the way to reach these cliff dwellings?" exclaimed the other, as though one thing that had bothered him was now explained.
"Yes, that was how it came about," answered Eugene. "We have followed him like his own shadow for days, and yet he knew it not. Age must have dimmed the sight and hearing of the warrior. After we saw him pass upward, on investigating, we found the stone ladder in the crevice, and we waited several hours for him to come down, for we wanted to make sure of him first. As he did not appear, we finally could stand it no longer, and began to creep up here, inches at a time. Then we surprised you, and announced our intention of stopping with you."
"Yes," declared the scientist, bitterly. "First you pretended that you were sent out by a magazine to search for me, and get some points as to my great work here among the Zunis, the Hopis and the Moquis. But I soon discovered that you had another motive in trying to find Professor Oswald. You began to hint about your desire to possess stock in certain mines, and especially in one, the ownership of which I had carried in my hand for some years. Besides, I had been warned of your real intentions, and was on my guard."
"What became of that old Moqui Indian?" went on Eugene. "He climbed up, but he did not come down. We guarded that stairway closely every minute of the time. We have searched every room in this rabbit burrow that we could discover; but still he does not show up. Have you put him away in some place, the entrance to which is hidden from our eyes?"
The only reply to this question was a scornful laugh. As Bob would say, it was as if the defiant little professor had flashed out.
"Don't you wish you knew?"
"Well, as the document and the Moqui have both vanished mysteriously, there's only one thing I can conclude," went on Eugene, between his teeth; "and that is they must be together at this very moment. Produce the one, and the other will be found not far away."