in letterpress, across bottom under image on mount: Negative by T.H. O'Sullivan. Entered according to act of Congress, in the year 1866, by A. Gardner, in the Clerk's Office of the District Court of the District of Columbia. Positive by A. Gardner, 511 7th st. Washington. / Field Where General Reynolds Fell, Gettysburg. / No. 37. July, 1863.
Mary and Dan Solomon; purchase and gift to NGA, 2006.
- Hambourg, Maria Morris. The Waking Dream: Photography's First Century. Selections from the Gilman Paper Company Collection. Exh. cat. Metropolitan Museum of Art, 1993.