1989
National Gallery of Art, 1937
National Gallery of Art, 1935
National Gallery of Art, 1899
National Gallery of Art, 1728
National Gallery of Art, 1999
National Gallery of Art, 1927
National Gallery of Art, 1894
National Gallery of Art, 1916
National Gallery of Art, 2006
National Gallery of Art, 1972
National Gallery of Art, 1940
National Gallery of Art, 1936
![Hippocrates and Dr. John Freind [reverse]](https://api.nga.gov/iiif/9ded7ef5-62b1-44fc-ba1d-629b2c83a549/full/843,/0/default.jpg)
![Untitled [trial proof]](https://api.nga.gov/iiif/5d6c8926-8922-48b8-8d91-3fd299efc0d0/full/843,/0/default.jpg)
![Viola [working proof]](https://api.nga.gov/iiif/e0e613a8-23fe-44fe-a069-5cb35f09eb52/full/843,/0/default.jpg)
