They spent the morning in a fruitless search and in the afternoon Courant insisted on the train moving on. They cached provisions by the spring and scratched an arrow on the rock pointing their way, and underneath it the first letters of their names. It was useless, the leader said, to leave anything in the form of a letter. As soon as their dust was moving on the trail the Diggers would sweep down on the camp and carry away every scrap of rag and bone that was there. This was why he overrode Susan's plea to leave David's horse. Why present to the Indians a horse when they had only sufficient for themselves? She wrung her hands at the grewsome picture of David escaping and stealing back to find a deserted camp. But Courant was inexorable and the catching-up went forward with grim speed. She and the old man were dumb with depression as the train rolled out. To them the desertion seemed an act of appalling heartlessness. But the mountain man had overcome Daddy John's scruples by a picture of their own fate if they delayed and were caught in the early snows of the Sierras. The girl could do nothing but trust in the word that was already law to her. He rode beside her murmuring reassurances and watching her pale profile. Her head hung low on her breast, her hat casting a slant of shadow to her chin. Her eyes looked gloomily forward, sometimes as his words touched a latent chord of hope, turning quickly upon him and enveloping him in a look of pathetic trust. At the evening halt she ate nothing, sitting in a muse against the wagon wheel. Presently she put her plate down and, mounting on the axle, scanned the way they had come. She could see the rock, rising like the clumsy form of a dismantled galleon from the waters of a darkling sea. For a space she stood, her hand arched above her eyes, then snatched the kerchief from her neck and, straining an arm aloft, waved it. The white and scarlet rag flapped with a languid motion, an infinitesimal flutter between the blaze of the sky and the purpling levels of the earth. Her arm dropped, her signal fallen futile on the plain's ironic indifference.