August Le Plongeon, on a ladder propped by saplings, photographing the area of the south vaulted passageway; a Maya assistant in the foreground.
Photograph by Augustus and Alice Dixon Le Plongeon, ca. 1873. Scanned from a high quality 35mm slide provided by the Getty Research Institute, taken from an original photograph in their collection. The image area of the photographs is ca. 3 1/2 x 3 7/8 inches. Reproduced with permission. Research Library, The Getty Research Institute, Los Angeles (2004.M.18).