Collection, 1848-1988, of the Quincy Mining Company of Hancock, Michigan. Documents the development of the company from its humble start in 1846 through the cessation of underground mining in 1931 and the sale and disbursement of its Michigan properties in the 1970s and 1980s. Includes corporate records, administrative correspondence, financial and legal documentation, employment and medical records, property and miners’ housing records, as well as operational records from the company’s underground, surface, stamp mill, reclamation, railroad, and smelting operations. Also includes records of several mining companies related to the Quincy Mining Company which operated in Houghton, Ontonagon, and Keweenaw Counties and on Isle Royale.

Arranged in 8 series: 1. Corporate Records, 1848-1970. 2. Correspondence, 1872-1986. 3. Financial Records, 1852-1988. 4. Operational Records, 1860-1971. 5. Other Related Companies' Records, 1859-1988. 6. Employment and Medical Records, 1851-1988. 7. Property, Dwelling and Rent Records, 1859-1988. 8. Municipal Records (now part of State Archives Collection), 1867-1978.