1963
National Gallery of Art, 1835
National Gallery of Art, 1919
National Gallery of Art, 1890
National Gallery of Art, 1616
National Gallery of Art, 1935
National Gallery of Art, 1941
National Gallery of Art, 1872
Frank, Robert, 1956
National Gallery of Art, 1623
National Gallery of Art, 1884
National Gallery of Art, 1931
National Gallery of Art, 1950
![begonnene Elefantenstudie (Initial Sketch of an Elephant) [p. 31]](https://api.nga.gov/iiif/35932a00-3af6-4324-ae81-26b14c4de566/full/843,/0/default.jpg)
