Scope and Contents From the Sub-Series: The Detroit and Lake Superior Copper Company Records contain correspondence, receipts, invoices, and reports of General Managers John R. Grout and James R. Cooper and Chief Clerk Z. W. Wright. It includes records from its predecessor, the Waterbury and Detroit Copper Company.Note that the Keweenaw Historical Society filed the material into company files based on the content of the letter, not the correspondent.Note that the records of the Detroit and Lake Superior...

Scope and Contents From the Sub-Series:

This subseries includes financial and meeting records, as well as correspondence from copper companies such as the Baltic Mining Company, Corbin Copper Company, and Franklin Mining Company, and from other organizations such as the Houghton County Anti-Tuberculosis Society and Old Setters Ball.

Scope and Contents From the Sub-Series:

This subseries consists of Benedict's research files on copper milling and the Calumet and Hecla Mining Companies.