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Soldier in the 24th Michigan Infantry during Civil War, later civil engineer concerned largely with construction of bridges and canals, especially improvements of St. Mary's Falls Canal, and consultant engineer to Panama Canal project. Correspondence, Civil War diaries, essays on proposed Nicaraguan Canal, printed materials, maps, and other miscellanea; also photographs.

The Alfred Noble Papers collection consists of several letters and diaries documenting his service with the 24th Michigan Infantry during the Civil War and correspondence, construction documents and other material relating to his work as a civil engineer on a number of major projects including the St. Mary's Canal, the Harlem Tunnel in New York, Panama Canal, Alton Bridge on the Mississippi and a proposed Nicaraguan Canal. The collection is organized in two series, Papers and Printed Works, 1853-1906. The Papers series is available on microfilm.

Livonia, Michigan family; Civil War correspondence and diary of Alfred G. Ryder, Co. H, First Michigan Cavalry, and correspondence of John E. Ryder, Co. C, Twenty-forth Michigan Infantry, including mention of the battle of Gettysburg. Collection includes originals, some transcripts, and photocopies of documents still in family possession.

The collection consists almost entirely of Civil War letters written by Alfred G. and John E. Ryder from August 1861 to July 1863. There is a single diary, a large series of correspondence consisting of 193 letters (88 of which are original letters and the rest are photocopies), handwritten transcripts of the letters, a series of three letterbooks, one folder of newspaper articles, and another of photocopies of photographs.