The collection consists of manuscript and printed letters, prospectuses, and brochures describing oil and mining investment opportunities in Colorado, Alaska, and Arizona. The bulk of the collection concerns mining ventures in Colorado, and particularly well-represented companites include the Crosby-Ehrich Syndicate, the Jack Pot Mining Company, and Tucker, Ballard, and Company of Colorado Springs; the Ramsay C. Bogy Investment Company of Denver; and the Gold Coin Mining and Leasing Company of Victor. The bulk of the materials is addressed to John Waddell and was collected by him as a prospective investor in oil and mining ventures. Some of letters, prospectuses, and reports include pictorial representations of oil fields. Printed maps of the mines of the Pinnacle Junior Mining Company of Colorado Springs and Alaska's Klondike River Valley are also included.
The collection consists of approximately 6000 slides of images of trains and railroad scenes taken by John Wallace from 1947 to 2004. Most of the railroads are those from the Northeast United States but also include images of railroads in California, Florida, Nebraska, and Virginia, and countries including Canada and Germany.
The papers of John Wadhams Buell (1821-1864), his sister, Mary Theresa Buell (1814-1900), and other family members. There is documentation of his involvement in several mining ventures, including the Connecticut Mining Company, and deeds to property owned by his ancestors.
The John W. Cook Interviews with Architects consist of recorded interviews conducted with American architects prominent in the mid-to-late 20th century. These interviews were recorded by Cook and Heinrich Klotz in 1969-1970 and largely transcribed in their 1973 book Conversations with Architects, published by Praeger Publishers, New York. The full interview with Louis Kahn was transcribed more recently in Louis I. Kahn in Conversation, edited by Jules David Prown and Karen E. Denavit and published by Yale University Press in 2015.
The papers contain correspondence and other papers documenting John W. Dodd's service in the Mexican War and the effect the conflict had on his wife Eliza in Marion, Indiana.
The John Wesley Blassingame Papers consist of note cards and research materials (electrostatic copies) used in the preparation of his dissertation, A Social and Economic History of the Negro in New Orleans (Yale University, 1971). Included are copies of reports of Louisiana state agencies, minutes and other papers of organizations like the White League of New Orleans, and legal documents deposited in the Orleans Parish courthouse.
The collection consists of correspondence, military orders, muster rolls, and family material. Letters from John Geary's wife, Margaret, and brother, Edward, reflect political thinking on the national level. There is material from court martial proceedings, including the charges against Capt. Samuel H. Montgomery.
The collection consists of the official papers of John Geary while governor of Kansas Territory, 1856-57, with some personal papers, 1855-71. The papers document Kansas during the Free State War and the building of the capitol.
The papers of John Whitney Hall consist of correspondence and news clippings from his time at Doshisha University, writings, files from the various academic and administrative positions held at the University of Michigan and Yale University, photographs, and files from his work to improve better understandings between the citizens of Japan and the United States. The papers document his life as an undergraduate and his academic and professional career.