1863–1873
National Gallery of Art, 1825
National Gallery of Art, 1970
National Gallery of Art, 1887
National Gallery of Art, 1884
National Gallery of Art, 1506
National Gallery of Art, 1620
National Gallery of Art, 1958
National Gallery of Art, 1873
National Gallery of Art, 1502
National Gallery of Art, 1880
National Gallery of Art, 1979
National Gallery of Art, 1935
![Nilpferdkopf im Profil (Hippo Head in Profile) [p. 17]](https://api.nga.gov/iiif/22aa7896-4b1c-46d0-8e2e-145df89b695a/full/843,/0/default.jpg)
![Coat [special proof]](https://api.nga.gov/iiif/8266058a-6c8a-4db8-aed0-72341ffaac67/full/843,/0/default.jpg)
