1852
National Gallery of Art, 1936
National Gallery of Art, 1935
National Gallery of Art, 1929
National Gallery of Art, 1959
National Gallery of Art, 1907
National Gallery of Art, 1884
National Gallery of Art, 1945
National Gallery of Art, 1625
Bruce Fund, Ailsa Mellon, 1645
National Gallery of Art, 1937
National Gallery of Art, 1970
National Gallery of Art, 1967
![Nilpferdkopf mit geöffnetem Maul (Hippo Mouth Open) [p. 27]](https://api.nga.gov/iiif/40890b8f-34f2-4042-a758-055cee939ead/full/843,/0/default.jpg)
