One day he would pan the sandy gravel, and the next day he would rest his back digging post-holes or something comparatively easy. He worked from daybreak until it was too dark to see, and he never left his claim except when he went to wash gold up in the gulch. The world moved on, and he neither knew nor cared how it moved; for the time being his world had narrowed amazingly. If Billy Louise had not been down there in that other world, he would scarcely have given it a thought, so absorbed was he in the delightful task of putting a good, solid foundation under his favorite air-castle. That fascinated him, held him to his work in spite of his hunger to see her and talk with her and watch the changing lights in her eyes and the fleeting expressions of her face. Some day he hoped he would have her with him always. He put it stronger than that: Some day he would have her with him, there in that little valley he had chosen; riding with him over those hills that smiled and seemed to stand there waiting for their invasions, with the echoes ready to fling back his exultant voice when he called to her or sang for her or laughed at her; ready to imitate enviously her voice when she laughed back at him. He wanted that day to come soon, and so with days and hours and minutes he became a miser and would not spend them in the luxury of a visit to her. It seemed to him that his longing for her measured itself by the enormous appetite he had for work, that summer. Week followed week as he followed that thin, fluctuating streak of pay gravel along the ledge. Sometimes it was rich enough to set the pulse pounding in his temples; sometimes it was so poor that he was disgusted to the point of abandoning the work. But every day he worked, it yielded him something--though there was a week when he averaged about fifty cents a day and lived with a scowl on his face--and he kept at it.