It seemed to her that the only way would be to climb on to the engine and pull at their coats. The step was high, but she got her knee on it, and clambered into the cab; she stumbled and fell on hands and knees on the 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.