Tent. When views are taken by the wet collodion process, in which the free nitrate of silver is not removed from the plate by washing, it becomes necessary to operate either in a dark room, or van, or tent, at or near the spot whence the view was taken; for otherwise the latent image is destroyed…
A Dictionary of Photography edited by Thomas Sutton and George Dawson (London: Sampson Low, Son, & Marston, 1867), p.351-352.