Correspondence, family papers, notes, reports, briefs, newspaper clippings, and printed material relating to Stanley-Brown's genealogical studies, his service as private secretary to Presidents Garfield and Arthur, his work in connection with the arbitration (1891-93) between the U.S. and Great Britain over sealing in the Bering Sea and on the Pribilof Islands, and his tenure as a superintendent in Alaska for the North American Commercial Company. Prominent individuals represented in the papers include Henry W. Elliott, John W. Foster, George Kennan, Robert Lansing, H.H. McIntyre, and Thomas C. Mendenhall.