the interaction of form and ground and the mobility of everyday life, what she called "unfixity", life and movement captured on canvas. Her style is noted for its sensitive modeling of form and "a submarine pearliness and density of atmosphere". During this time, Bishop began working in various printing techniques, most notably aquatint. Her work was included in the first three iterations of the Whitney Biennial in 1932, 1934, and 1936, as well as ten subsequent annual exhibitions at the Whitney Museum of American Art. She returned to the Art Students League as an instructor from 1936 to 1937. In 1940, Bishop was elected into the National Academy of Design as an associate member, and became a full member in 1941. Her work was also part of the painting event in the art competition at the 1932 Summer Olympics. She was also a member of and frequently shown her work in the Society of American Graphic Artists exhibitions. In 1938, she painted a post office mural, Great Men Came from the Hills, in New Lexington, Ohio, through the Section of Painting and Sculpture. According to the Ohio Historical Society, “In Isabel Bishop’s mural for New Lexington, historic personages from the town admire their achievements across the valley, where we see the forms and silhouettes of distant buildings. The artist, from New York City, discovered that the townspeople were proud of the distinguished people who came from Perry County. She included a Revolutionary soldier, a governor of Wisconsin, a founder of New Lexington and his grandson, an author of reference books on Ohio, the developer of the coal industry, a senator, a newspaperman, a naturalist, the county’s first historian, and General Sheridan.” Bishop's mature works mainly depict the inhabitants of New York's Union Square area. Her portraits are often studies of individual heads (see Laughing Head, 1938, Butler Institute of American Art); the emphasis securely on the subject's expression – or of solitary nudes. Bishop also painted multiple-figure compositions, often containing two females engaged in various workday interactions. In the post-war years, Bishop's interest turned to more abstracted scenes of New Yorkers walking and traveling, in the streets or on the subways. Her signature changed many times over her career, ranging from the use of various pseudonyms to initials; some early pieces are signed I.B, or I. Bishop in both block and script. Her work remains significant as an example of