1681
National Gallery of Art, 1935
National Gallery of Art, 1861
National Gallery of Art, 1937
National Gallery of Art, 1884
National Gallery of Art, 1923
National Gallery of Art, 1903
National Gallery of Art, 1740
National Gallery of Art, 1877
National Gallery of Art, 1970
National Gallery of Art, 1755
National Gallery of Art, 1936
![Seelöwe (Sea Lion) [p. 21]](https://api.nga.gov/iiif/fbed8a6c-3703-4da1-8083-339caa8622bb/full/843,/0/default.jpg)
![Studies of a Head [verso]](https://api.nga.gov/iiif/1caeadfc-2105-43e8-83aa-8aaf576b889a/full/843,/0/default.jpg)
