The boys traversed the valley from north to south but saw no indications of tents or camp-fires. The ridge to the west ran out at the north end of the valley, and the boys turned there, preferring not to ascend into the cold air again unless it became necessary.
The valley in which they now found themselves ran in a northeasterly direction and broke into a canyon at the end farthest to the east and north. The boys turned as they swung around the point of rock and whirled along the new depression. Presently Carl caught his chum by the arm and handed him the field-glass with which he had been looking over the country. Jimmie used the glass for a moment and then turned back to Carl with a pleased look on his freckled face.
“You know what that is, don’t you?” he asked.
“Sure!” Carl answered.
“That’s the north end of our own valley, we see,” Jimmie went on, “and the shelf we have just come in sight of is the one from which the red and green signals were shown night before last.”
“That’s right!” grinned Carl.
“Then, don’t you see,” Jimmie went on, “the signals were made for the benefit of some one in this valley.”
“That’s the idea!” Carl chuckled.
“Now, suppose we find the tent the Englishman left in this vicinity,” the boy went on, “what would that mean?”
“It would suggest to me,” Carl replied, “that the signals were made for the benefit of some one in that camp.”