Wooden box containing a stereoscopic viewer with its Spirite stereo.
 A very original viewer that retracts completely to fit into a wooden box.
 Closed box dimensions: 11.5 x 19 cm
 BWKILBURN stereo card, Littleton, NH "An angel's blessing"
 In the early days of photography, ghostly images were observed in photographs. Due to long exposure times, anything that moved during the exposure was either not recorded or was recorded transparently. In 1856, Sir David Brewster, a key figure in the development of the medium, described in *The Stereoscope, Its History, Theory, and Construction* how to create ghosting in photographs.
 While Brewster clearly viewed this as entertainment and a photographic trick, others, increasingly interested in the paranormal, saw it as "proof" of the existence of spirits. Photographic séances and demonstrations of "photography of the invisible" became commonplace in the late 19th century.