upper center, in black ink: 197.; lower center: C.M. & P. RR Bridge at Sabula, Ia 1885.
Major A. Mackenzie, United States Army Corps of Engineers [d. 1921], Washington, DC. Mike Conner, Washington, DC, 1990; (sale, Sotheby's, New York, 16 October 1990, no. 67). Betsy S. Aubrey and E. Steve Lichtenberg, MD, San Francisco (through the Simon Lowinsky Gallery, New York), 1992; gift to NGA, 2012.