chatter of iron on iron. He kept at it, and in the end he almost finished the allotted work, but for all of it he paid in full. The acid loneliness ate into him. To be sure, from boyhood he knew the mountain quiet, the still heights and the solemn echoes, but towards the close of the long isolation the end of each day found him oppressed by a weightier sense of burden; in a few days he would begin to talk to himself.
From the first the evening pause after supper hurt him most, for a man needs a talk as well as tobacco, and after a time he dreaded these evenings so bitterly that he purposely spent himself every day, so as to pass from supper into sleep at a stride. It needed a long day to burn out his strength thoroughly, so he set his rusted alarm-clock, and before dawn it brought him groaning out of the blankets to cook a hasty breakfast and go slowly up to the tunnel. In short, he wedded himself to his work; he stepped into a routine which took the place of thought, and the change in him was so gradual that he did not see the danger.
A mirror might have shown it to him as he stood this morning at the door of his lean-to, for the wind fluttered the shirt around his labor-dried body, and his forehead puckered in a frown, grown habitual. It was a narrow face, with rather close-set eyes and a slanted forehead which gave token of a single-track mind, a single-purposed nature with one hundred and eighty pounds of strong sinews and iron-hard muscle
