Jack London photographing the skeleton of the Snark, in which he sailed across the south Pacific, in San Francisco Bay, 1906. Jack London was a prolific photographer in addition to his writing. (Photo by Jack London/Courtesy of Contrasto)





Salvation Army barracks in London during Sunday morning rush – men who had been given tickets during the night queuing for free breakfast, 1902. (Photo by Jack London/Courtesy of Contrasto)





Homeless women sleeping in Spitalfields Garden, London, 1902. (Photo by Jack London/Courtesy of Contrasto)





Antung Harbor, Manchuria, 1904, where London reported on the Russo-Japanese war. (Photo by Jack London/Courtesy of Contrasto)





The devastation caused by the San Francisco earthquake on Kearny Street, 1906. (Photo by Jack London/Courtesy of Contrasto)





Buildings damaged by the San Francisco earthquake, 1906. (Photo by Jack London/Courtesy of Contrasto)





Inhabitants of Nuku Hiva, largest of the Marquesas Islands in French Polynesia, 1907. (Photo by Jack London/Courtesy of Contrasto)





The pali (cliff) trail on the island of Molokai, Hawaii, 1907. (Photo by Jack London/Courtesy of Contrasto)





The American adventurer and film director Martin Johnson, one of the members of the Snark crew, poses with a native of the Solomon Islands. Guadalcanal, 1908. (Photo by Jack London/Courtesy of Contrasto)