Inscription: in turquoise ink, verso, 15" [fifteen second exposure]; 1'30" cloudy Oct 5/40 [one minute and thirty seconds exposure, cloudy, 5 October 1840]; in pencil, recto, X2; pencil rule line along one edge
Watermark: man [sic]
Watermark (expanded): Whatman
Owner:Smithsonian Institution's National Museum of American History