Group outside Lacock Abbey, Wiltshire, c 1840s.
© National Media Museum / Science & Society Picture Library
Photograph taken by William Henry Fox Talbot (1800-1877). Fox Talbot invented the first negative/ positive process for producing photographs between 1835-39. Any number of prints could be made from the same shot by transferring the negative image on to special paper to make a positive print; these prints were called calotypes.