"The grass, for one thing," came the reply. "Then I noticed quite a few old sun-burned remnants of skulls as we came along. The bone hunter didn't gather his crop in this region, that means. Besides, didn't you see all those queer little indentations that looked as though they might have been pools away back years ago?"

"Sure, I did; and wondered whatever could have made them," Bob admitted.

"I may be wrong," Frank continued; "but somehow I've got an idea that those must be what they used to call buffalo wallows. Anyhow, that doesn't matter to us. We've made a good day of it; found a jim-dandy place for a camp; got some juicy fresh meat; and to-morrow we hope to land in Flagstaff."

"And what then?" queried Bob.

"We'll decide that while we ride along to-morrow," Frank answered. "Perhaps it may seem better that we leave our horses there, and take the train for the Grand Canyon; though I'm inclined to make another day of it, and follow the old wagon trail over the mesa, and through the pine forest past Red Butte, to Grand View."

"Listen to Buckskin snorting; what d'ye suppose ails him?" asked Bob, as his chum stopped speaking.

"I was just going to say that myself," remarked Frank, putting out his hand for his rifle; and at the same time scattering the brands of the dying fire so that darkness quickly fell upon the spot.

"Too late, I'm afraid," muttered Bob.

"Seems like it, because the horses are sure coming straight for us," said Frank; "but there are many people moving around in this section, and perhaps some tenderfeet from the East have lost themselves, and would be glad of a chance to sit by our blaze and taste antelope meat, fresh where it is grown. Step back, Bob, and let's wait to see what turns up!"[Contents]