"Hello, Jim!" called the conductor to the engineer who was leaning out of the window of his little house. "Here's the boy who stopped the train so suddenly a while back."

"Oh ho! Is he?" asked the engineer. "Well, he isn't a very big boy, to have stopped such a big train."

"I—I didn't mean to," said Bunny, and he and Sue looked back, and saw that truly it was a long train. And the locomotive pulling it was a very big one.

"Well, you didn't do much damage," laughed the engineer.

"I'm going to bring them up to see you," the conductor said.

"That's right, let 'em come!"

The engineer came out of his cab and took first Bunny, and then Sue, from the conductor, who lifted them up to the iron step near the boiler. A hot fire was burning under the engine to make steam, and Bunny and Sue looked at it in wonder.

Then the engineer took them up in his cab, and showed Bunny where, on the ceiling, was the little air whistle—the one Bunny had blown when he pulled the cord with the parasol. Then the engineer showed the children the shiny handle that he pulled to make the engine go ahead, and another that made it go backward. Then he showed a little brass handle.

"This is the one I pulled on in a hurry when I heard you blow the whistle once," he said.

"What handle is that?" asked the little boy.