Minutes of meetings, correspondence with stockholders and suppliers, annual statements and reports to state agencies, records relating to stock assessments and transfers, stock ledgers and a stock journal, financial ledgers and statements, records relating to ore shipment and production, and time books and payrolls of a silver-lead mining company in the Evolution Mining District of the Coeur d'Alene mining region of Idaho.

Letter from William L. Spalding to H. K. Moore.

Correspondence, articles, speeches, minutes of meetings, and other papers of George Arthur Williams (1918- ), professor of geology at the University of Idaho, 1957-1988. Included are correspondence, a report on, and notes of, a student study of mercury contamination in the Jordan Creek drainage near Silver City, Idaho.

Articles, speeches, correspondence and patents of Wallace G. Woolf, metallurgical engineer at the Bunker Hill Mining Company.

Correspondence and legal documents of a mining corporation lawyer and his successor, Paul B. Jessup, of Wallace, Idaho, reflecting his association with the Hercules Mining Company and other Day family interests.