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A pair of photographic images on a single support of stiff card. When viewed through a specially designed stereoscope, a stereograph gives the appearance of a single three-dimensional image. The photographs are not identical but have a slight lateral shift having been made with a dual lens camera, each photograph being what the human eye would see.

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Emma Glossop
by Unknown photographer
NPG x131831

Charles Dickens
by Herbert Watkins
29 April 1858
NPG x5585

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