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Charles Martin and W. H. Longley. A yellow and black porkfish swims in the reef. Natural Habitat, Florida Keys, USA. 1920s.

Charles Martin. A view of the Stanford Memorial Chapel in Palo Alto. 1920s.

Charles Martin. A woman poses with the ruins of the San Juan Capistrano Mission. 1920s.

Charles Martin. A man and a woman sit on a cliff in front of Bridal Veil Falls. 1920s.

Charles Martin (1877-1977) first director of the National Geographic photo lab. He was a true genius in applied chemistry to photography, thanks to him were made the first underwater photographs in color. In 1926 Charles Martin, with the photographer and botanist W. H. Longley, documented the life of the coral reefs of the Dry Tortugas.