"What's the matter?" asked Bunker Blue. "Anything wrong?"

"The motor sounds rather strange," answered the pattern-maker. "I was just wondering——"

He did not finish the sentence before the engine suddenly stopped with a sort of wheeze and groan which showed something was wrong.

"Something's caught in the flywheel," declared Bunker Blue.

"That's what it sounds like to me," added Uncle Tad.

"We'll have a look," stated Mr. Ravenwood, as he shut off the gasolene supply and opened the electric switch. Then he proceeded to lift the wooden covering of the engine.

"What's the matter?" asked Bunny Brown, looking back.

"The engine has stopped," his mother told him.

"What made it?" Sue wanted to know.

"That's what Mr. Ravenwood is trying to find out," said Uncle Tad.