Abstract: Correspondence; diaries; mss. of writings; publications; materials on organizations including Unesco and Charles Darwin Foundation for the Galapagos Isles, conferences, including CCTA/IUCN Symposium on the Conservation of Nature and Natural Resources in Modern African States (Arusha, Tanzania, 1961), Darwin Centennial Celebration (University of Chicago, 1959), and Ciba Foundation Symposium on Man and His Future (London, England, 1963), travel, and his tenure as professor at Rice Institute;...