Abstract Collection, 1747; 1800-1975, bulk 1890-1970, of Ben R. Chynoweth, a resident of Hancock, Michigan and amateur historian of Isle Royale, Michigan. Collection documents the shipping, mining endeavors and fishing industry of Isle Royale in addition to the formation of Isle Royale National Park in 1940. Photographs in the collection show the island's geographical features, the people, the fishing industry, and the Great Lakes ships. Includes pamphlets, correspondence, maps, scrapbooks and...

Abstract Drawings, 1871-1970, of the Calumet and Hecla Mining Companies. Contains hand sketches, tracings, blueprints and related manuscript items as well as a card index created by the company. Includes more than 80,000 engineering and architectural drawings gathered by the Calumet and Hecla Mining Company during its active life as a copper mining company in Michigan’s Keweenaw Peninsula. Much of the machinery was built in-house at Calumet and Hecla and they also had need of maps of both aboveground...

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Collection, 1874-2021 (Bulk 1874-1998), of research material and memorabilia compiled by Charles K. Hyde.

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Indexes, 1940-1973, for subjects in the Daily Mining Gazette, a newspaper published in Houghton, Michigan.

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Collection, 1883-2012 (Bulk, 1970-2012), related to Cornish family lines and Cornish Americans, especially the Rule Family.

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Papers, 1830-1846, of Douglass Houghton, Michigan's first state geologist as well as a physician and scientist. Includes correspondence, survey maps, geological field notes for the interior Lower Peninsula, the shorelines of the Lower and Upper Peninsulas, and the southern shoreline of Lake Superior, Isle Royale, and the Upper Peninsula. Also includes a calendar and a small index volume with names.

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Collection, undated, of Harry T. Mercer, long-time employee of the Copper Range Mining Company and resident of Painesdale, Michigan. Includes technical drawings, a card index, and field notes.

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Microfilm collection, 1825-1987, includes copies of selected archival collections and indexes held by the Iron County Museum in Caspian, Michigan.

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Collection, 2013-2020, of local histories and indexes created by John Blom.

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Collection, 1833-1994, bulk 1860-1964, of genealogical and historical materials compiled by June and Richard Ross of Redlands, California.