As it turns out, these two men are the brothers of a young woman named Camille Roche, the photographer behind the mystery roll of film Bieber found. Camille Roche/Courtesy Todd Bieber hide caption

itoggle caption Camille Roche/Courtesy Todd Bieber

Stereo photographs, called Kromograms, show the earthquake-damaged San Francisco of 1906. They are thought to be the first color photographs from one of the worst natural disasters in U.S. history. Frederick Eugene Ives/Smithsonian's National Museum of American History hide caption

itoggle caption Frederick Eugene Ives/Smithsonian's National Museum of American History