Harley A. Sill Papers

The bulk of the collection contains letters, documents, maps, and reports related to the professional activities of mining engineer Harley A. Sill (1885-1964). There are reports on ores and mines and technical data, chiefly from California, Arizona, Nevada, Canada and Mexico. There are also some reports on mines in other parts of the United States and in South and Central America. There is also one small box containing bibliographical references related to mining and metallurgy (Box 15) and one oversize bound volume detailing a mine in Ontario, Canada.