She was helping with the preparation of the midnight meal for the laborers, hurrying from the steaming cauldrons to the benches and baskets, filling the big pots with coffee, arranging the tin cups in their stacks for the various crews, and doing something that Houston knew was of more value than anything else,--bringing a smile to the tired men who labored beside her. And this in spite of the fact that the black rings of fatigue were about her eyes, that the pretty, smoothly rounded features had the suggestion of drawnness, that the lips, when they ceased to move, settled into the slightest bit of a droop. Now and then she stopped by one of the tables and clung to it, as though for support,--only to perk her head with a sudden little motion of determination, to turn, and then with a laugh go on with her work. Presently he heard her singing above the clatter of kitchenware and the scuffling of the men with their heavy, hobnailed shoes. And he knew that it was a song of the lips, not of the heart, that she might lighten the burden of others in forgetfulness of self. And as he watched her, Houston knew for all time that he loved her, that he wanted her above all things, in spite of what she had been led to believe of him, in spite of everything. His hands extended, as though to reach toward her,--the aching appeal of a lonely, harassed man, striving for a thing he could not touch. Then hope surged in his heart. If the woman back there in the west country only would tell! If she would only keep the promise which she had given him in her half-delirium! It meant the world to Barry Houston now,--something far greater even than the success for which he had struggled; she could tell so much! For Houston felt that Agnes Jierdon knew the details of practically every conspiracy that had been fashioned against him; the substitution of the lease and contract in the pile of technical papers which he had signed, the false story which she had told to Medaine,--suddenly Barry wondered if she really had passed the scene of his struggle with Tom Langdon, if she had seen anything at all; if her whole testimony had not been a manufactured thing, built merely for the purpose of obtaining his utmost confidence. If she only would tell! If she only would stay by her promise to a man who had kept his promise to her! If-- But a call had come from up the line. The whistles no longer were tooting; instead, they were blowing with long foghorn blasts, an eerie sound in the cold, crisp night,--a sound of foreboding, of danger. A dim figure made its appearance, running along the box cars, at last to sight Houston and come toward him. "Which car does the engine crews sleep in?" came sharply. Houston shook his head. "I don't know. Has something gone wrong?"