A hand-coloured collodion positive (ambrotype) of a family group, taken by Leck in about 1860. The woman in the centre of the photograph is either the eldest daughter or, presumably, the mother of the five children around her. The collodion positive process (also commonly known as ambrotype) was popular during the 1850s and 1860s. An underexposed collodion negative on glass was backed with a black opaque coating to create a unique positive image.
© National Media Museum / Science & Society Picture Library