lower left in graphite: A imp.; lower right in graphite: Clifford Addams; lower left edge in graphite by unknown hand: An Obscure Turning II; upper left verso in graphite by unknown hand: 62; lower right verso in graphite by unknown hand: (h)
Jack and Margrit Vanderryn, Bethesda, Maryland; Corcoran Gallery of Art, Washington, DC, 2004; acquired 2015 by the National Gallery of Art
- Whistler and His Circle in Venice, Corcoran Gallery of Art, Washington, DC; Grolier Club, New York; Columbia Museum of Art, South Carolina, 2003-2004
- Hausberg, Meg. Clifford Addams: Etchings and Drypoints. London: N.W. Lott & H.J. Gerrish, 1984, no. 20.