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Professor of civil engineering at University of Michigan. Railroad valuation and appraisal files; lectures and reports; personal materials.

The Henry Earle Riggs collection includes correspondence and documents, 1914-1924, relating to valuation of the Detroit United Railway. This includes correspondence removed from the files of Mortimer E. Cooley. There are also other materials relating to public utilities valuation, civil engineering, and public works, mainly lectures, addresses, articles, and testimony.

Of special note is a file of correspondence relating to University of Michigan Civil Engineering alumni killed in World War I, file on the history of the Ann Arbor Railroad, and a 1942 speech describing problems of the proposed Willow Run, Michigan, wartime housing development.

Flint, Michigan, attorney and Republican state representative. Correspondence concerning the automotive industry, particularly his firms dealing with the General Motors Corporation and other automobile companies; also papers concerning state politics, the Republican Party, and the Constitutional Convention of 1907-1908; also docket books, 1883-1921, with record of cases handled by Carton and his partners.

The collection has been divided into the following series: Correspondence, 1900-1920; Masonic Papers, 1909-1920; Railroad, 1919-1920; Law Materials.