Abstract The Hecla Consolidated Mining Company was a Glendale, Montana, gold and silver mining company. Records (1871-1900; 1921-1922) include incoming correspondence to mining department superintendent Samuel A. Barbour, interoffice correspondence (1877-1881) and letterpress books (1871-1886) of outgoing correspondence of general manager Henry Knippenberg. There are also employment records (1876-1922); financial records; a minute book (1898-1906); minor legal documents; production records; and...