1918
National Gallery of Art, 1794
National Gallery of Art, 1920
National Gallery of Art, 1849
National Gallery of Art, 1939
National Gallery of Art, 1949
National Gallery of Art, 1465
National Gallery of Art, 1923
National Gallery of Art, 1884
National Gallery of Art, 1505
National Gallery of Art, 1905
National Gallery of Art, 1973
![Mandrill [p. 34]](https://api.nga.gov/iiif/79ce9512-4bb0-49c0-88a1-0eaf0c1d5c26/full/843,/0/default.jpg)
![Begonnenes Skizze (Sketch of Face) [p. 9]](https://api.nga.gov/iiif/749de5df-39f2-4de3-846c-a17d52b0166a/full/843,/0/default.jpg)
