"Sometimes the light makes each range stand out, casting sharp shadows on the ones behind. Occasionally when the air is very clear, there is a strange and breath-taking shining light on the green aspen leaves. At evening the twilight may run quickly from the valley, shrouding almost at once the highest peaks. Or mauve and rose move slowly upward, turning to blood-red on the snow above. One morning they may be purple cardboard mountains sharpcut against the sky. On another they will have withdrawn into themselves. Sometimes I have watched ghost mountains with substance only in their dark outline. It seems then as if the mountains had gone down into their very roots, leaving an empty frame." - Edith Warner quoted in The House at Otowi Bridge