"Something gone wrong?" asked one of the men, pleasantly, while the third member of the trio was getting out of the powerful car that had pulled up back of Dick's.
"Yes, the motor stopped without any reason, as far as I can see," said our hero. He gave a hasty glance at the men. As far as he could tell he had never seen any of them before. A look at Mr. Cameron showed that he was not perturbed at their arrival, for he was looking at some queer rocks at the side of the roadway.
"Perhaps I can be of some service," said another of the trio. "I know something of autos."
"We'll take a look," agreed Dick, as he opened the bonnet over the motor. "It's the first time it's gone back on me since I had it, except for a little brake trouble," he went on.
"It's a mighty fine car," said the stranger. "I don't know as I ever saw one like it."
"She was built to order," said Dick, not caring to go into details. Yet he had no intention of concealing anything, for he realized that their enemies, if they desired to keep track of their progress, could do so anyhow, since the car was not one to be easily forgotten.
While Dick and the man who had admitted that he was something of an auto expert, were going over the motor, looking for the trouble, the other two strangers had gone back to their car.
"Want any help?" asked Paul, as he and Innis strolled about.
"I guess not," said Dick. "Make yourselves comfortable. We'll start as soon as we can."
Mr. Cameron was walking idly about, examining different geological specimens. Then the two men who had gone back to their car discovered that one of the tires had a puncture, and was down almost flat. They called this information to the one who was with Dick, and the latter answered: