new we
wanted to find the man who had given him the talking paper; and was
afraid we might try to make him tell; or, that failing, stalk him when
he went to deliver my note. And on the whole I can't much blame the old
Indian. Suspicion is a part of their nature. He believed he was on the
safe side in slipping away as he did. Forget it, Bob. We've learned a
heap by his just dropping in on us, I think."

"Sure we have," replied the other, being busily employed over the fire
just then. "And I was thinking what he could have meant when he pointed
off in the direction I calculate the Grand Canyon lies, and said in
answer to one of your questions: 'Seek there! When the sun is red it
shines in Echo Cave!'"

"I've guessed that riddle, and it was easy," Frank remarked.

"Then let me hear about it, because I'm pretty dull when it comes to
understanding all this lovely sign language of the Indians," Bob
remarked.

"Listen, then. The sun is said to be red when its setting; that's plain
enough; isn't it, Bob?"

"All O.K. so far, Frank. I won't forget that in a hurry, either."

"Then, when he said it looked into the cave at sunset, it was another
way of telling us the cave faced the west!" Frank continued.

"Well, what a silly chap I was not to guess that," chuckled the other.

"And from what I know about the bigness of that canyon, Bob, I think
that this unknown Echo Cave must be pretty high up on the face of a big
cliff to the east of the river."

"Why high up? I don't get on to any reason for your saying that?"
inquired Bob.

"You'll see it just as soon as I mention why," remarked his companion.
"When the sun is going down in the west, far beyond the horizon, don't
you see that it can only shine along the very upper part of the cliffs?
The lower part is already lost in the shadows that drop late in the
afternoon in all canyons."

"Of course, and it's as plain to me now as the nose on my face," agreed
Bob. "Queer, how easy we see these things after they've been explained."

It did not take long to prepare breakfast, and still less time to eat it
once the coffee and venison were ready. Just as Frank had said, there
was plenty of the meat for the meal.

"That was a mighty juicy little antelope, all right," remarked Bob, as
he finished his last bite, and prepared to get up from the ground where
he had been enjoying his ease during the meal.

"And for one I don't care how soon you repeat the dose," remarked Frank;
"on