This collection consists of general correspondence, subject files, legal documents, financial records, and miscellany from 1885 to 1936 (predominantly 1910-1922). The general correspondence includes information on the Samuel T. Hauser Estate; S.T. Hauser, Jr.; Helena and Livingston Smelting and Reduction Company; American Smelting and Refining Company; and miscellaneous mining information. The collection has subgroups for George H. Hill, Glacier Peak Mining and Smelting Company, and Florence Child Hill.