across bottom, lower center in graphite: 4 color YGBR Falling Figure SWHayter 67; by later hand, lower center verso in graphite: 21116-e
- Black, Peter, and Désirée Moorhead. The Prints of Stanley William Hayter: A Complete Catalogue. Mount Kisco, New York: Moyer Bell Limited, 1992, no. 178, iv/iv.