by Alfred Stieglitz, on mount, upper left verso, in graphite: Set C2 [2 in subscript] No.1
by Georgia O'Keeffe, on mount, upper left verso, in graphite, underlined: 216-A
by later hand, on mount, lower right verso, in graphite: 021
Georgia O'Keeffe; gift to NGA, 1949.
- Bry 1958, no. 62.
- "Visual Music", The Museum of Contemporary Art, Los Angeles; Hirshhorn Museum and Sculpture Garden, Washington, 2005.