by Alfred Stieglitz, on mount, upper left verso, in graphite: Set C2 [2 in subscript] No. 4
by Georgia O'Keeffe, on mount, upper left verso, in graphite: 216-D
by later hand, on mount, lower right verso, in graphite: 023
Georgia O'Keeffe; gift to NGA, 1949.
- Photographs by Alfred Stieglitz, National Gallery of Art, Washington, March 16 – April 27, 1958, no. 65.
- On the Art of Fixing a Shadow: 150 Years of Photography, National Gallery of Art, Washington, May 7 – July 30, 1989; The Art Institute of Chicago, September 16 – November 26, 1989; Los Angeles County Museum of Art, December 21, 1989 – February 25, 1990.
- "Visual Music", The Museum of Contemporary Art, Los Angeles; Hirshhorn Museum and Sculpture Garden, Washington, 2005.
- Greenough, Sarah, and Joel Snyder, David Travis, and Colin Westerbeck. On the Art of Fixing a Shadow: One Hundred and Fifty Years of Photography. Washington, DC: National Gallery of Art; Chicago: Art Institute of Chicago, 1989, pl. 256.