1988
National Gallery of Art, 1850
National Gallery of Art, 1974
National Gallery of Art, 1939
National Gallery of Art, 1884
National Gallery of Art, 1927
National Gallery of Art, 1864
National Gallery of Art, 1935
National Gallery of Art, 1945
National Gallery of Art, 1630
National Gallery of Art, 1910
National Gallery of Art, 2009
National Gallery of Art, 1937
![Schlafender Mandrill (Sleeping Mandrill) [p. 24]](https://api.nga.gov/iiif/bcfae61f-e852-4d02-a813-f5670ee1e0df/full/843,/0/default.jpg)
![Untitled [verso]](https://api.nga.gov/iiif/3c468d20-727c-439d-a745-3bd766f8c80d/full/843,/0/default.jpg)
