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Curator of the University of Michigan Botanical Gardens and professor in the Department of Botany; journals, films, photographs, plant list, and drawings of plant habitats from the 1938 Nevill's Colorado River Expedition and following travels in 1939; also articles written about the expedition.

The Elzada Clover collection consists almost entirely of material relating to the 1938 Nevill's Colorado River Expedition. Included are Clover's journals, motion pictures of the trip, photographs, plant list, and drawings of plant habitats both from the 1938 Expedition and from later travels in 1939. There are also articles written about the expedition.

In 2009, DVD use copies were made of the motion pictures.

Marshall, Calhoun County, attorney, Republican state senator, 1878-1882; contain correspondence, legal files, diaries and financial records concerning business and family affairs and the history of Marshall; also family papers, including Civil War letters of brother, Philo D. Patterson, student letters from the University of Michigan of son, Frank D. Patterson, 1892-1894, and records of business partner William H. Brown.

The John C. Patterson collection is divided into the following series: Correspondence; Letterpress books; Legal files; Diaries; Miscellaneous business records; John C. Patterson personal; and Other family members and miscellaneous. Much of the correspondence is addressed either to Patterson or to William H. Brown and pertains to their law practice. Other correspondence relates to family matters, politics, and Hillsdale College. Included in the correspondence are nine letters of Philo D. Patterson written while he was serving in Company H, Ninth Michigan Infantry, February-September 1865. Two of the letters reflect on the assassination of President Lincoln. There are also letters from Frank Dean Patterson, 1892-1894, when he was a student at the University of Michigan.

The Letters, Documents, and Other Manuscripts of the Duane Norman Diedrich Collection is a selection of individual items compiled by manuscript collector Duane Norman Diedrich (1935-2018) and the William L. Clements Library. The content of these materials reflect the life and interests of D. N. Diedrich, most prominently subjects pertinent to intellectual, artistic, and social history, education, speech and elocution, the securing of speakers for events, advice from elders to younger persons, and many others.

The Letters, Documents, and Other Manuscripts of the Duane Norman Diedrich Collection is a selection of individual items compiled by manuscript collector Duane Norman Diedrich (1935-2018) and the William L. Clements Library. The content of these materials reflect the life and interests of D. N. Diedrich, most prominently subjects pertinent to intellectual, artistic, and social history, education, speech and elocution, the securing of speakers for events, advice from elders to younger persons, and many others.

For an item-level description of the collection, with information about each manuscript, please see the box and folder listing below.