1971
National Gallery of Art, 1976
National Gallery of Art, 1975
National Gallery of Art, 1936
National Gallery of Art, 1846
National Gallery of Art, 1870
National Gallery of Art, 1947
National Gallery of Art, 1944
National Gallery of Art, 1604
National Gallery of Art, 1963
National Gallery of Art, 1895
Corcoran Gallery of Art, 1977
National Gallery of Art, 1952
![Flagstones (b) [trial proof 2]](https://api.nga.gov/iiif/b1ff268d-e5cd-4005-9aab-79cd68ad681d/full/843,/0/default.jpg)
![Study of Hands Knitting [recto]](https://api.nga.gov/iiif/1a4c4503-0ce4-4e97-a298-6276049cf977/full/843,/0/default.jpg)
