in letterpress, across bottom under image on support: Alex. Gardner, Photographer, 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. 511 7th Street Washington. / A Sharpshooter's Last Sleep, Gettysburg, Pennsylvania. / No. 40. July, 1863.; on verso, by unknown hand, upper left in graphite: AP. 37; bottom center in graphite: AG/1188
Mary and Dan Solomon; purchase and gift to NGA, 2006.