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Ocha Potter was a copper mining engineer and adventurer who also played an important role in the promotion of Keweenaw County, Michigan as a vacation destination during the 1930s and 1940s. Over the course of his career, Potter made important contributions to the field of copper mining, including the development of a safer, more efficient method of stoping and advocacy for the use of the lighter "one-man" alternative to the ubiquitous two-man drill. He also led and undertook many travels and expeditions both for work and leisure, which he documented in photographs. This collection contains three photo albums, documenting Potter's travels to Alaska (1905-1908), Africa and Europe (1930), and national parks in the American West (1923, 1934 and 1936). It also contains a manuscript of his autobiography, family correspondence about the manuscript, and newspaper clippings and ephemera related to Potter's life, career, and involvement with the Copper Country Vacationist League.

Collection contains three photo albums with photographs taken by Potter on his trips to Alaska, Africa, Europe, and the United States. Also newspaper clippings about Potter, ephemera related to Potter's involvement with the Copper Country Vacationist League, family correspondence, manuscript of Ocha's autobiography, and biographical information about him by his granddaughter Julia Fairchild.

Ann Arbor, Michigan attorney, American consul in British Guiana in 1905, and U.S. Congressman, 1911-1913. Political and business correspondence, notes and addresses, and other materials relating to his business interests and political career; also papers concerning his trips to Alaska, British Guiana, and Panama.

The Wedemeyer collection includes political and business correspondence, notes and addresses, and other materials relating to his business interests and political career. There are also papers concerning his trips to Alaska, British Guiana, and Panama. Some of his correspondents included Russell A. Alger, James B. Angell, Gerrit J. Diekema, Frederick Douglass, Benjamin Harrison, Frank Knox, Charles E. Townsend, James Schermerhorn, Henry C. Smith, and Fred M. Warner.