Abstract:Mitchell, a legendary leader of the United Mine Workers of America (UMWA), was born 4 February 1870 in Braidwood, Illinois, to Robert Mitchell and Martha Halley. Though mostly working in Illinois, he also worked in both Colorado and New Mexico. Mitchell was first a member of the Knights of Labor and then, successively, legislative agent, organizer, vice president and president of the fledgling UMWA. He was also vice president of the American Federal of Labor (AFL) and member of the National Child Labor Committee, the National Civic Federation, Federal Milk Commission, Federal Food Board for New York City, New York State Labor Industrial Commission, New York State Food Administration, and the New York State Council of Farms and Markets. It was, however, as president of the UMWA, 1899-1908, that Mitchell would have his greatest impact. His leadership in the momentous Anthracite Coal Strike of 1902 resulted in significant gains for coal miners and greater recognition for the UMWA. Often in poor health, Mitchell stepped down as UMWA president in 1908 and died in 1919. He is buried in Scranton, Pennsylvania. His published works include Organized Labor: Its Problems, Purposes, and Ideals (1903) and The Wage Earner (1912). The photographs digitized here, 1898-1924, entail many portraits of important people, such as Clarence Darrow and Theodore Roosevelt, as well as significant events like the 1902 Anthracite Coal Strike. There are also photographs illustrating mining techniques of the time.