Collection, 1883-2012 (Bulk, 1970-2012), related to Cornish family lines and Cornish Americans, especially the Rule Family. Materials document Cornish families in Michigan's Keweenaw Peninsula, and they relate to the Cornish-American experience in the Midwest and the Cornish diaspora more generally. Contents include correspondence, ephemera, genealogies, genealogy research papers, indexes, ethnic research periodicals, vital records, and photographs.