"We know all about that, Graydon," interposed Matt.
"You do?" cried Graydon. "Who told you?"
"Harris."
"Now where in the blazes did you see Harris? He halted the automobile in the road and asked me to get out and take a look through the old quarry. When I got back to the road again the car was gone, and so was Harris. I've been at sixes and sevens ever since. Why did Harris pull out and leave me?"
"He didn't go of his own free will, Graydon. He was knocked down and carried in an unconscious condition to a house in La Grange," and Matt briefly explained what had happened.
Graydon's amazement was keen.
"Well, what do you think of that!" he exclaimed. "Here I've been pottering around in the vicinity of that old quarry for two hours, wondering where Harris was, and why he didn't show up. I got the notion that maybe he had seen some one and had given chase, and that perhaps he'd come back. After two hours of waiting and looking, I gave up and started for La Grange. Then I saw the air ship, and now you tell me the automobile has been stolen, and that Harris is scurrying around La Grange, hunting for the machine and for Hector Brady! I suppose I ought to be there with him."
"You might just as well go on with us, Graydon," said Matt. "We're going back to the quarry and Harris is coming there as soon as he finishes his work. You'll probably find him a whole lot quicker if you go with us than if you keep on to La Grange."
"I'm willing enough to go with you," answered Graydon, "because I'm tired out. I've had footwork enough to-night to last me for a week."
"What did you find in the old quarry? Anything?"