Charles Burchfield was one of the most inventive American artists of the twentieth century. Throughout most of his career, watercolor was his medium of choice, sometimes used in combination with gouache, graphite, charcoal, conté crayon, chalk, or pastel. During Burchfield’s lifetime three major periods in his work were generally acknowledged: an early period dating from roughly 1915 to 1921 when landscape was often treated in metaphysical, fantastic ways; a middle period dating from the early 1920s to the 1940s when realism reigned; and a late period which marked a return to a transcendental, mystical perspective.