1968
National Gallery of Art, 1950
Patrons' Permanent Fund, 1960
National Gallery of Art, 1938
Gemini G.E.L., 1989
National Gallery of Art, 1935
National Gallery of Art, 1927
National Gallery of Art, 1931
National Gallery of Art, 1763
National Gallery of Art, 1639
National Gallery of Art, 1641
![Figure 7 [trial proof]](https://api.nga.gov/iiif/f3771b79-765f-4336-addb-4c11704fc68d/full/843,/0/default.jpg)
![Mining Works on Monte Leone [reverse]](https://api.nga.gov/iiif/f3efd679-01c2-4694-97fc-5943efff2bfb/full/843,/0/default.jpg)