“No, we’re only getting up a little plan to scare that old nuisance, Joffy, and keep him away from this tent,” explained Jerry. “If we don’t, he’s likely to damage our Comet.”

“Indeed, he is. Scare him good and proper while you’re at it. But now, if you’re ready, we’ll adjust the planes and see how they look.”

The boys were very busy the remainder of the day, and when they were finished the airship looked more than ever like a machine that would navigate the upper regions. It was large and imposing, and would be more so when the car containing the machinery was in position.

That night Jerry and his chums spent several hours in the big tent, taking cautious observations outside, every now and then, to see that neither Noddy nor Joffy were sneaking around to spy on them. The motor boys were not much bothered by the lads of the town, for they had promised all the youngsters, who did not annoy them by trying to gain admittance to the tent at forbidden times, a trip in the airship.

“Well, it’s ’most done,” remarked Ned, when, close to midnight, the boys left the tent, a watchman being on guard to insure that no damage would come to the Comet.

“Yes, we did better than I thought we would,” admitted Jerry. “I can make the dummy to-morrow night and then, with a couple of lanterns fastened to it, we’ll be all ready to give Joffy something to think about.”

The next day the troublesome old man was seen around the tent, but he did not attempt to enter. Possibly he did not see a good chance to annoy the boys.

“Is everything ready, Jerry?” asked Bob that evening, when, after their day’s work on the airship, the four lads were gathered in the tent.

“All ready,” replied the chief conspirator. “All I have to do is daub a little phosphorus on the dummy and it will be in shape to do the ghost dance. But I don’t want to do that until the last minute. How’s the wind, Ned?”

“Good, and in the right direction. We can stand in the clearing, and let it go right over his cabin.”