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Civil engineer, served as Michigan state highway commissioner, chairman of the Mackinac Straits Bridge Authority and president of Portland Cement Company. Papers primarily document work with highway commission and Mackinac Straits Bridge Authority.

The papers, 1928-1968, of G. Donald Kennedy document his career in civil engineering, his participation in professional organizations, his activities as a state official, and as a supporter of the Michigan Democratic Party. The collection Includes correspondence, speeches, minutes, reports, articles, clippings, and photographs. The files relate to his work as municipal engineer in Pontiac, Michigan, with the Mackinac Straits Bridge Authority, the American Association of State Highway Officials, the Automotive Safety Foundation, and the Huron-Clinton Metropolitan Authority. The collection also includes papers relating to highway and airport construction, to economic mobilization during World War II, the Willow Run Bomber Plant, state Democratic Party matters, particularly the campaign visits of President Roosevelt to Michigan in 1936.

Pioneer in the private camping movement, founder and director of Al-Gon-Quian Boys Camp on Burt Lake in Cheboygan County, Michigan, and officer in the American Camping Association. Correspondence, articles, speeches and photographs; also Camp Al-Gon-Quian materials, including program files, reports, roster files, and published yearly programs; materials of King family, missionaries in China; and plans of Twining home in Ann Arbor, Michigan, originally designed by Albert Kahn and his associate Malcolm for Louis A. Strauss.

The papers of Herbert Twining, except for an earlier family letter from 1888, date from the 1920s to 1980. The collection is broken down into a series of personal and family materials, a series on Camp Al-Gon-Quian, 1931-1967, and photographs.

Charlevoix, Michigan resident, novelist and historian of Great Lakes shipwrecks, the Mackinac Bridge, folklore, and other subjects; correspondence, manuscripts of books, and research materials.

The William Ratigan collection consists of correspondence, manuscripts of his books, research and reference files on topics of interest to him, and photographs. There are letters in the collection from William B. Eerdmans, Marianne Moore, Milo Quaife, David B. Steinman, and folklorist Ivan Walton.

The photographs in the collection are of shipping and boating at Charlevoix, Michigan, of Charlevoix boat builder, Roy Ranger, of construction of the Mackinac Bridge, of the Sault Sainte Marie Canal, and of other topics related to Ratigan's writing interests.