“Did he bring plans, so he can build a big one for us?” demanded Bob.

“He sure did. Come on and look ’em over. That’s why I came for you. Did you tell your folks about our plans?”

“You mean building an airship?” asked Ned.

“Sure.”

“I did,” declared Bob. “My mother thinks it’s all talk, but we’ll show her.”

“My dad doesn’t take much stock in it,” remarked Ned. “I guess he thinks it will fizzle out.”

“Wait until they see the plans and the model,” said Jerry. “That will show we mean business. But come on. I told Mr. Glassford I’d come right back with you.”

All enthusiasm, the two boys leaped from the hammocks, and were soon accompanying Jerry back to his house. There they found their acquaintance of the carnival, but what attracted their attention as soon as they entered the library where he was sitting was a complete model of a curious airship, about three feet long, which was suspended from the chandelier.

“There’s a small size model of the future Comet,” exclaimed Jerry. “You see, I’ve named our motor ship already, just as I did our motor boat.”

Comet’s a good name,” was Mr. Glassford’s opinion. “Now, if you boys will draw up your chairs I’ll briefly explain my plans for a motor ship.”