lower left in graphite: 17/30; lower center in graphite: Laocöon; lower right in graphite: SWHayter 43; center right in graphite by unknown hand: 2=27 1/2 x 17 3/8
Lessing J. Rosenwald, Jenkintown, Pennsylvania; acquired 1945 by the National Gallery of Art
- Graphic Survey Show, National Gallery of Art, Washington D.C., 1987-1988.
- Black, Peter, and Désirée Moorhead. The Prints of Stanley William Hayter: A Complete Catalogue. Mount Kisco, New York: Moyer Bell Limited, 1992, no. 154, iv/iv.