base of the great heap of coals that led up to the square opening in the tender. The engine was not above the weaknesses of its fellows; it was making a great deal more noise than there was the slightest need for. And just as Roberta fell on the coals, the engine-driver, who had turned without seeing her, started the engine, and when Bobbie had picked herself up, the train was moving—not fast, but much too fast for her to get off.

All sorts of dreadful thoughts came to her all together in one horrible flash. There were such things as express trains that went on, she supposed, for hundreds of miles without stopping. Suppose this should be one of them? How would she go home again? She had no money to pay for the return journey.

"And I've no business here. I'm an engine-burglar—that's what I am," she thought. "I shouldn't wonder if they could lock me up for this." And the train was going faster and faster.

There was something in her throat that made it impossible for her to speak. She tried twice. The men had their backs to her. They were doing something to things that looked like taps.

Suddenly she put out her hand and caught hold