1988
National Gallery of Art, 1940
National Gallery of Art, 1915
National Gallery of Art, 1921
National Gallery of Art, 1820
National Gallery of Art, 1966
National Gallery of Art, 1875
National Gallery of Art, 1631
National Gallery of Art, 1597
National Gallery of Art, 1731
National Gallery of Art, 1976
National Gallery of Art, 1837
![An Ascending Spiral of Figures [recto]](https://api.nga.gov/iiif/4b46b349-c6de-4c90-bf14-394ac054be51/full/843,/0/default.jpg)
![Hatching and Flagstones [trial proof 2]](https://api.nga.gov/iiif/e8cc1ee1-4316-42f6-9653-30eda965dbc2/full/843,/0/default.jpg)
