He and Dick talked interestedly of the mechanical side of autos, while the carbureter was put in shape for a test. Meanwhile the two men were working away at their tire. They seemed to be having trouble with it, and Paul and Innis were just going to ask if they did not want some help in return for the service their friend was rendering Dick, when Mr. Cameron exclaimed: "I'll lend 'em a hand. I want to learn how to change a tire. I may have an auto of my own some day." With the three of them at work, the tire was soon in shape and pumped up. But Dick's car would not respond. The self-starter was tried again and again, but, though the motor flywheel was turned over rapidly, the cylinders would not take up their work. "She doesn't seem to be getting a spark," said the man. "How is your magneto?" "It never has been out of order," said Dick. "Still, there is always a first time." "Let's have a look at that," the stranger suggested, and he and Dick went around on the other side of the car where the electrical mechanism was located under the bonnet. As they reached it there came from the other car the staccato sound of the exhaust. One of the men had started it going. "Now don't let me keep you!" exclaimed Dick. "It's getting late, and we can bunk here all night if we have to. You can't." "No, that's where you have the advantage of us. But I'll just have a look at your magneto, and then I'm afraid I'll have to be getting on. I'll be with you in a minute!" he called to his two friends. "Are you ready to start?" "We will be in a minute," came back the answer. Mr. Cameron was standing near the machine, while Paul and Innis had strolled over to a spring and were drinking. Suddenly, as Dick looked, he saw one of the men at the other auto make a jump for Mr. Cameron. The latter leaped back, but not in time to avoid being caught. The young millionaire had a glimpse of a white cloth being pressed over his friend's face, and a moment later the two men had lifted him into the tonneau. Then, while one held the struggling engineer there, the other leaped to the steering wheel. "Come on!" he cried, evidently to the man with Dick. "We're ready now!" "Good!" and with that the third man raced from Dick's side and the next instant was in the moving auto. A moment later it passed Dick's car with a burst of speed, and went down the road in a cloud of dust, bearing off Mr. Cameron. For a moment Dick could not find his voice. Then as the significance of what had occurred dawned on him he cried out: "Paul--Innis! They've got Mr. Cameron! It was a trick! Those are some of Uncle Ezra's agents! They're going to get Mr. Cameron out of the way and spoil our case. Come on!" The two cadets came running back, surprise showing on their faces. "We've got to get him back!" cried Dick. "But how can you, with our car stalled?" asked Paul.