“I’m not through with you!” warned the aviator, still quivering with rage; “I go, but I return and will make you rue this hour!”

“By-by; I shall be ready for you whether you call by day or at night.”

With two bounds the lunatic reached his machine, sprang into his seat, jerked the lever which controlled the uplifter, and began rising from the earth. As soon as he was clear of his surroundings, he sailed away at terrific speed, and it was noticeable that he headed south, which was in the direction of his Purvis workshop.


CHAPTER XXIV.
A NEW RISK.

“WOULD I have shot Professor Morgan?” repeated Dick Hamilton in recalling the incidents just related to his friends in camp. “Not for the world. I should no more have fired at that poor fellow than I should have slain—well, say that buck with the big antlers.”

“But you made frightful threats against him.”

“All pure bluff; I didn’t mean a word of it; you know that the first step to secure mastery of a lunatic is to make him afraid of you. I found it rather hard work in the Professor’s case, but think I succeeded.”

“What would you have done if he had attacked me, as he started to do?” asked Harvey.