by later hand, lower center in graphite: CEW.244.X
David and Mary Robinson, Sausalito, CA; NGA purchase, 1995.
- The First Century of Photography: New Acquisitions, National Gallery of Art, Washington, 1995.
- Carleton E. Watkins: Photographs 1861-1874. San Francisco: Fraenkel Gallery, in Association with Bedford Arts, Publishers, 1989, illus. pl.72.