'Soliloquy of a broom', January 1841.
© National Media Museum / Science & Society Picture Library
Salted paper print from a calotype negative, from a series of similar views, by William Henry Fox Talbot (1800-1877). Fox Talbot invented the negative/positive process for producing photographs between 1835 and 1839. 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.