1929
National Gallery of Art, 1923
National Gallery of Art, 1936
National Gallery of Art, 1970
National Gallery of Art, 1937
National Gallery of Art, 1860
National Gallery of Art, 1976
National Gallery of Art, 1792
National Gallery of Art, 1952
National Gallery of Art, 1920
National Gallery of Art, 1938
![Flagstones (b) [trial proof 6]](https://api.nga.gov/iiif/5940683e-619f-42f7-ad99-033332401401/full/843,/0/default.jpg)
