1980
National Gallery of Art, 1976
National Gallery of Art, 1828
National Gallery of Art, 1951
National Gallery of Art, 1973
National Gallery of Art, 1928
National Gallery of Art, 1927
National Gallery of Art, 1956
National Gallery of Art, 1936
National Gallery of Art, 1647
National Gallery of Art, 1961
National Gallery of Art, 1943
National Gallery of Art, 1935
![Flagstones (b) [trial proof 6]](https://api.nga.gov/iiif/5940683e-619f-42f7-ad99-033332401401/full/843,/0/default.jpg)
![Summer [recto]](https://api.nga.gov/iiif/e4355450-071c-4ae5-b071-6880be49bc63/full/843,/0/default.jpg)
