"Why, there's a big window, for light, in the back part of it. I happened to notice it the other day. I didn't look in, because I wasn't much interested, but I saw that one could peer over the top of our fence right into the shop where Andy is working. Want to try it?"
Tom hesitated a moment.
"Well, it seems rather an odd thing to do," he said. "But I would like to see what sort of a flying machine Andy is making, just for my own satisfaction. He may be infringing on some of my patents, and if he is, I'll stop him. Once or twice he's been sneaking around my shed here. I don't believe in sneaking, but I know he wouldn't let me in if I asked him, so I guess it's the only way. I'll go with you, Ned."
"All right. We'll see if we can get a glimpse of Andy's queer shebang through the window."
The two chums left Tom's shop, and were soon in the yard of Ned Newton's house. As he had said, the big shed in Andy's premises came close up to the fence, and there was a window through which one might gaze. The casement did not appear to be curtained.
"I'll get a ladder so we can climb up to the top of the fence, and look over," spoke Ned, as he and Tom went out into the yard back of his house. The fence was high up on an embankment.
A little later Tom and his chum were gazing into the shop window from the ladder.
"Why, it's a triplane—a big triplane!" he exclaimed.
"What's a triplane?" asked Ned, who didn't have much time to study the different types of airships.
"It's one that has three sets of planes, one above the other. A biplane has two sets of planes, and a monoplane only one. Triplanes are larger, and, as far as I've been able to learn, not as satisfactory as either the biplanes or monoplanes. But that's not saying Andy's won't be a success. They certainly are busy in there, though! Andy is flying around like a hen scratching for her little chickens!"