A stereoscopic photograph of Kulb, Northern Sudan, taken in 1859 by Francis Frith (1822-1898). Francis Frith was a pioneer of travel photography. He was also one of photography's greatest entrepreneurs, founding a company that was to become the largest publisher of photographs in the world. Frith saw himself as a romantic adventurer in the mould of Byron. A stereograph is a pair of photographs which, when viewed through a stereoscope, give the appearance of three-dimensional depth. Stereoscopic photography became very popular in the 1850s and 1860s - particularly after it was exhibited at the Great Exhibition in 1851.
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