The Ladder from "The Pencil of Nature", plate XIV. 1844. Varnished salted paper print, mounted to board. 16,8 x 18 cm (mount ca. 23,4 x 30,5 cm). With an ink outline around the image; original paper label on the verso reading “PATENT TALBOTYPE or SUN PICTURES,” numbered “14” in ink, and annotated in ink: “At Lacock Abbey, Wilts.”

Larry J. Schaaf. The Photographic Art of William Henry Fox Talbot. Princeton: Princeton University Press, 2000, see pp. 200-201.