William Henry Fox Talbot, pioneer photographer, c 1840.
© Science Museum / Science & Society Picture Library
Talbot (1800-1877) is best known for his development of the calotype, an early photographic proces that was an improvement over the daguerreotype of the French inventor Louis Jacques Mande Daguerre (1789-1851). Talbot's calotypes involved the use of a photographic negative, from which multiple prints could be made. Had his method been announced a few weeks earlier, he and not Daguerre would probably have been known as the founder of photography.