1934
National Gallery of Art, 1747
National Gallery of Art, 1956
Williams, Dave H. and Reba W., 1952
National Gallery of Art, 1508
National Gallery of Art, 1873
National Gallery of Art, 1478
National Gallery of Art, 1938
National Gallery of Art, 1940
National Gallery of Art, 1870
National Gallery of Art, 1830
National Gallery of Art, 1978
National Gallery of Art, 1884
![Crocodile and Trochilus [reverse]](https://api.nga.gov/iiif/ccff09fd-9970-4f56-bfbd-c75494a2f5f8/full/843,/0/default.jpg)
![Begonnene Studie (Sketch) [p. 33]](https://api.nga.gov/iiif/4ee8e42f-a8ba-47c8-97ab-ba54c3b2a662/full/843,/0/default.jpg)