2006
National Gallery of Art, 1923
National Gallery of Art, 1949
National Gallery of Art, 1624
National Gallery of Art, 1894
National Gallery of Art, 1850
National Gallery of Art, 1774
National Gallery of Art, 1852
National Gallery of Art, 1920
National Gallery of Art, 2019
National Gallery of Art, 1951
National Gallery of Art, 1472
National Gallery of Art, 1966
![Two Friars on a Hillside [recto]](https://api.nga.gov/iiif/d9d6db01-d478-4e41-b976-dc77224a0af4/full/843,/0/default.jpg)
![Light Bulb [trial proof]](https://api.nga.gov/iiif/39f6b9a2-a46c-4656-b348-585b10ca5b83/full/843,/0/default.jpg)