Attorney and secretary of the interior. Diaries, correspondence, family papers, legal documents, and business and political records relating primarily to Garfield's business concerns and public service.

Explorer, United States Army officer, and author. Correspondence, letterbooks, memoranda, diaries, speeches, lectures, writings, military papers, biographical material, Greely (Greeley) family correspondence, scrapbooks, financial records, clippings, maps, prints, memorabilia, and other papers relating primarily to Greely's military career and exploration of the polar regions.

Economist and editor. Correspondence, project reports, writings, printed matter, and other papers relating chiefly to Kellock's work with the Federal Writers' Project, the Department of State, and the Department of Agriculture Resettlement Administration.

Geologist and civil service reformer. Kentucky state geologist from 1880 to 1893 and chairman of the United States Civil Service Commission from 1893 to 1903. Chiefly correspondence relating to Procter's service as chairman of the United States Civil Service Commission and efforts to reform the civil service.

Civil Service commissioner and comptroller of the currency. Correspondence, speeches, and other material.