Papers of Hugh Robert Mill including manuscript and printed papers relating to Antarctic whaling expeditions; collection of approximately 200 letters to Mill from officers of the Royal Geographical Society chiefly concerning the affairs of the RGS, 1847-1944; collection of approximately 800 letters to Mill from geographers, travellers cartographers and others, 1833-1944; 'Daily Doings', two volumes, 1861-1919 and 1920-1945, which briefly record the events of each day, contain lists of Mill's published works and the appointments he held, and are indexed by personal and place names.

French documents collected by Sir George Fordham relating to posts, routes and cartographers in 18th century France including a receipt and two letters signed by Jacques Cassini; a memoir and a letter of Pierre Tardieu and papers of Rigoley d'Ogny including three letters.