“Pull lever A and throw off B toward you three notches!” Bob yelled to Jerry.

“Which is lever A and which is lever B?” asked Jerry. “They’re not marked on the machine.”

“That’s so, I forgot that,” admitted Ned.

“What am I going to do?” begged Jerry. “Have I got to ride around like this all night?”

“What’s in the name of Tunket is the trouble?” asked Mr. Hitter, the station agent, who was on his way down the road, and who had come to where Jerry was riding around in a circle with Bob and Ned in the centre.

“He can’t stop!” cried Ned and Bob at once.

“I knowed there’d some trouble come of that machine,” said Mr. Hitter, shaking his head. “I told you not to monkey with ’em. It all comes of man trying to improve on nature. Walking’s good enough for me. What particular form of trouble does the critter seem to be suffering from? I mean the motor-cycle.”

“There’s two levers,” explained Bob. “One is A and the other is B, according to the book. The trouble is they are not marked on the machine, and Jerry don’t know which one to pull.”

“Well, not knowing much about the case, I would advise him to pull ’em both,” said Mr. Hitter. “He can’t be any worse off than he is now, and maybe it’ll stop him.”