Collection, 1874-2021 (Bulk 1874-1998), of research material and memorabilia compiled by Charles K. Hyde. The collection includes research notes and annotated photocopies of articles of Hyde's research on copper and iron mining industry. Also included are mining company employee tags for Quincy Mining Company and Pewabic Mining Company, as well as a dog license tag for Houghton County. Additionally, the collection includes color slides