Author, historian, and newspaper editor. Correspondence, memoranda, writings and speeches, research notes, and other papers reflecting Brant's career with various newspapers, in the administration of Franklin D. Roosevelt, as a playwright, and his interest in James Madison.
Dental surgeon and inventor. Correspondence, legal records, and financial account books relating to Maynard's improvements in the manufacture and sale of firearms and documenting his dental practice in Washington, D.C.
Landscape architectural firm. The records include correspondence, letterbooks, memoranda, reports, plans, specifications, newspaper clippings, photographs, drawings, journals, account books, ledgers, lists, diagrams, blueprints, deeds, and printed matter constituting the business files of the firm and reflecting the breadth of the projects undertaken by its staff. A small group of Olmsted family papers is also contained in the collection.