Accounts, 1894-1925, of the United States Coast Guard at the Copper Harbor Light Station in Copper Harbor, Michigan. Includes daily expenditures and daily accounts of stores as well as the general account of supplies for Gull Rock Light Station, located off the northern tip of the Keweenaw Peninsula. Also includes an unidentified ship's log.

Records, 1915-1980, of the Daughters of the Eternal City, an Italian women's benefit society in Calumet, Michigan. Includes minutes of monthly meetings (earlier minutes in Italian), ledgers with payments of dues recorded as well as other financial records and reports. Also includes a ritual book, in Italian, and a certificate of appreciation from the Knights of Columbus.

Collection, circa 1890s-2003, of the Gundlach family of Houghton, Michigan. Includes business papers and records from the Herman Gundlach, Inc. construction company and the Barbara Kettle Gundlach Shelter Home as well as personal papers, photograph albums, notebooks, clipping albums, audiovisual materials, and other printed ephemera.

Journals, 1895-1930, kept by the lighthouse keepers at the Mendota Lighthouse in Bete Gris, Michigan. Daily entries include lighthouse duties and upkeep, some weather information, housekeeping activities, visitors and trips for provisions.

Papers, 1984-2002, of Ray Martin (Reino Marttinen) or Ontonagon, Michigan.

Records, 1976-1982, of the Superior Foods Cooperative Inc. in Ahmeek, Michigan. Includes organizational records, financial records and newsletters from Superior Foods as well as records from other cooperatives in the area. Includes bylaws, stock certificates, membership information, order forms and newsletters from Common Health Warehouse Cooperative Association in Duluth, Minnesota, their food supplier, and newsletters from the Keweenaw Cooperative Inc. in Hancock, Michgan.