The engineer, who is a careful man, and has a pride in his machine, is still with his engine, and Harry is delighted to see he is the one whose heart Erma has won by kindness to his child. "I was rubbing her up a little, Cap," he says. "I want to be sure she's all ready for to-morrow's work." "Is she ready for _to-night's_ work?" "What do you mean?" "I mean," answers Lawrence, who has looked the man over, and concludes it is better to lie to him than to argue with him, "that there are road agents on the train." For a moment the man looks at him in unbelief, then there is a little noise and commotion about the sleepers, and he cries: "My God! my child!" "Your child is safe. Buck is bringing her over!" says Harry, pointing at the figure of the boy, half leading, half carrying the little girl through the snow. "Any way," he goes on, "they would have done nothing to her; it's the other one they want, the heiress!" "What! that beautiful girl that kept my little one from starving? We must save her!" cries the engineer, getting hold of his own darling from Buck, who has come up. "We will!" whispers Lawrence. "Those road agents will only trouble her and Wells, Fargo & Co.'s express. The express must take care of itself--we'll take care of the girl!" "But how?" "By running her down to safety on your locomotive!" "Great goodness! I never thought of that!" replies the man of the throttle-valve. A moment after, he says: "I haven't got coal to reach further than Granger." "That'll do! Get up steam as fast as you can, but don't let anybody see you're at work on your locomotive." With these words, Lawrence goes into consultation with the engineer and Mr. Powers as to the details of the transaction. It is arranged that Harry is to do the work of the fireman, who is on the train, and whom they dare not take the risk of arousing; Buck is to turn the switch to put the locomotive on the main track, and to board them as they pass him, which they will do very quietly. Leaving the engineer quietly making his preparations, Lawrence walks cautiously across, not towards Miss Travenion's car, but towards the sleeper behind it--the one he occupies. From that he cautiously approaches the other, looks in, and finds it empty of all save Miss Travenion, who has apparently hurriedly dressed, and is seated, confronted by two men, who evidently have her in their keeping, as one says: "Don't be scared; we'll take good care of you, even if you have been tryin' to rob the Mormon Church!" Catching these words in the outer darkness of the rear compartment, Lawrence knows that Kruger has already had his say, and for some reason left the girl. Harry is glad of this, for feeling the revolver in his belt, he fears he might have killed the Mormon, which would probably not have saved either himself or his sweetheart.