Coal mine operator. Correspondence (1928–1937); labor contracts (1933–1939); wage notices (1917–1936); machine contracts (1921–1939); advertising brochures (1926–1936); and orders (1937–1939) issued by the National Bituminous Coal Commission of the U.S. Department of the Interior, all in regard to the coal mining industry in southeastern Oklahoma. Included is information regarding wages, mine safety and accidents, organized labor, industry standards, coal production, mine railroads, and a 1930 mine explosion in Pittsburg County, Oklahoma, in which thirty miners were killed. This collection also contains survey reports (1905–1906) submitted to the Samples Coal Mining Company regarding the potential coal wealth of the Choctaw Nation, Indian Territory, which the Samples Company later mined.