From a letter to Dr. Theodor Braasch, October 20, 1959

The latest picture is another "brain-storm." The memory of a dream - which was of seeing about a dozen newly emerged black-swallow tail butterflies clinging to a willow bush in a lake - When I go to painting it, the dream was left behind - I decided to paint a really yellow picture - the sky is varying shades of pure cadmium, and the cadmium yellow surrounds everything, and is reflected in the lake.
Charles E. Burchfield, October 20, 1959