1971
National Gallery of Art, 1619
National Gallery of Art, 1607
National Gallery of Art, 1936
National Gallery of Art, 1990
National Gallery of Art, 1918
National Gallery of Art, 1930
National Gallery of Art, 1935
National Gallery of Art, 1966
National Gallery of Art, 1921
National Gallery of Art, 1460
National Gallery of Art, 1976
National Gallery of Art, 1937
![Bent "Blue" [trial proof]](https://api.nga.gov/iiif/35edaecb-3ef9-49b5-802e-2e85077263dd/full/843,/0/default.jpg)
![Pinion [experimental proof]](https://api.nga.gov/iiif/e48fd298-4370-4399-a5ff-b55d2de9b377/full/843,/0/default.jpg)
