lower right in graphite: SW Hayter 44; lower center in graphite: Cronos; lower left in graphite: 30/50; upper left edge in graphite: For Minna + Jack / 21-10/47 SWH
Jacob and Ruth Cole Kainen, Chevy Chase, Maryland; acquired 1994 by the National Gallery of Art
- Black, Peter, and Désirée Moorhead. The Prints of Stanley William Hayter: A Complete Catalogue. Mount Kisco, New York: Moyer Bell Limited, 1992, no. 160, iv/iv.