Reclusive by nature, a character trait that became more exaggerated in the 1940s and later, Kelly’s work reflects his determination not to be limited by the trends of his time. His large output of paintings is complemented by a prolific number of drawings that span his career of 50 years. Some of the collections where his work is represented are the Metropolitan Museum in New York, The Whitney Museum of American Art, the Museum of Modern Art, the Philadelphia Museum of Art, and Boston Public Library.