The more Clay thought of the matter, the firmer became his conviction that the man he saw had twice before appeared in their journey from the Rocky mountains to that point. He might have been one of the campers, or he might have been hidden in the canyon back of the fire.

Gran had suggested the presence of a party not in view from where Alex had taken the snapshots. He had given no reason for this supposition, but Clay had come to the conclusion that it was a correct one.

Clay regretted then that he had not secured more definite information about the train robbery at Donald. He had not even learned whether any one had been arrested charged with the crime.

If the campers had been questioned and released as innocent, then it was certain that others had been in the pass at the time they were enjoying themselves before their fire. The men who had held up the train must have been already on the ground!

But, even then, this man and the companion who had swung onto the train which had towed the Rambler’s car away might have had no connection with this second party. They might have been merely loungers, waiting for an opportunity of getting out of the mountains without contributing to the treasury of the railroad company.

But why had they followed the Rambler? How had they managed to get into the valley of the Columbia ahead of her? Clay took it for granted that the conductor had told the truth, and that there were two on the train. He also accepted as true his impression that the second man was not far away.

There were many questions connected with the appearance of the fellow at that place which Clay could not answer, and so he gave them all up and devoted his whole attention to the intruder and his movements. The man stared about the little clearing for a minute as if expecting to meet some one there, and then limped out in the direction of the ridge near which the Rambler lay.

Captain Joe seemed anxious to interview the fellow and ask him a few questions, but Clay kept close hold of his collar and held him back when he would have bounded forward. The dog resented this, but kept quiet.

The long-armed man followed the canyon to the river front, glanced cautiously up to the spot where the Rambler lay, and crouched down in the shelter of a rock, as Clay thought, to wait for definite information regarding the situation on the boat.

Clay, following and watching, saw Case, Alex and Gran standing on the deck examining automatic pistols. He could not hear what they were saying, but their gestures indicated that they were thinking of going up on the mountainside to look for game.