all by later hands: on window mat, lower right verso, in graphite: 28E; on mount, lower left verso, in graphite: 28E
Georgia O'Keeffe; gift to NGA, 1949.
- Alfred Stieglitz: the Lake George Years, Art Gallery of New South Wales, Sydney, 2010, unnumbered catalogue.
- Greenough 2002, cat. 801.