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Camilla and Ethel Green were mother and daughter who resided in the Ann Arbor, Michigan area from the late 1800s through their deaths in 1955 and 1988, respectively. Both women corresponded prolifically with their family, friends and former students. This collection consists primarily of their letters, which are largely organized chronologically if not already grouped by correspondent.

This collection reflects the papers amassed by Camilla and Ethel Green over nearly a century. It is divided into four series: Family Background and Documents, University of Michigan, Correspondence, Photographs. The bulk of the collection occurs from 1910 to 1955 and features correspondence with various friends and family members; a large portion of the letters has been organized by correspondent and/or the correspondent's family, and the remainder is sorted chronologically.

Summer engineering camp of the University of Michigan at Jackson Hole, Wyoming. Records include correspondence, annual reports, and other papers relating to the establishment and administration of the camp; includes papers of camp directors Joseph B. Davis and Clarence T. Johnson; also includes records of predecessor surveying camps, including the Bogardus Engineering Camp at Douglas Lake, Michigan; and photographs.

The Camp Davis record group documents the summer camps for training students in the techniques of surveying and geodesy conducted by the College of Engineering's Department of Geodesy and Surveying. The bulk of the material concerns Camp Davis and Jackson Hole, Wyoming but also includes material relating to earlier camps at Douglas Lake and other sites in Michigan. The records are organized in five series: Histories; Michigan Engineering Camp, Early Sites, 1874-1912; Bogardus Engineering Camp, Douglas Lake, Michigan, 1906-1929; Camp Davis, Jackson, Wyoming Site, 1929-; and Photographs.

Dean of the College of Engineering of the University of Michigan; correspondence, letter books, appraisals and reports, lectures, blueprints, newspaper clippings, photographs, and other materials concerning his activities as dean of the College of Engineering, engineer for the U.S.S. Yosemite in the Spanish American War, chairman of the Block Signal and Train Control Board, Democratic candidate for the U.S. Senate in 1924, and coordinator for the P.W.A. in Michigan in 1933-1935; also genealogical materials on the Cooley family.

The Mortimer E. Cooley papers consists of correspondence, subject files, personal materials, and photographs detailing the professional career and activities of a distinguished engineering educator. The collection has been arranged into the following series: Correspondence; Topical Files; University of Michigan and College of Engineering materials; Genealogical and Miscellaneous; Arbitration, appraisal, and consultation files; Photographs; Naval Logs; and Testimonial and celebratory materials. Box 47 was eliminated during 2001 reprocessing.