"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.